More filesystem cleanup: convert URL-encoded-as-FilePath to actual URL, where

possible without WebKit API changes. The WebKit changes will happen in another 
CL. 

This is a resubmit of http://codereview.chromium.org/6767010/, which bounced
recently. There are a few changes here that weren't there [most notably in
file_system_operation_write_unittest.cc and file_system_operation.cc], but
they're pretty trivial build/test fixes.
Review URL: http://codereview.chromium.org/6833007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81463 0039d316-1c4b-4281-b951-d872f2087c98

26 files changed, 325 insertions, 434 deletions

diff --git a/webkit/fileapi/file_system_callback_dispatcher.h b/webkit/fileapi/file_system_callback_dispatcher.h
index 2bffe54..8504af9 100644
--- a/webkit/fileapi/file_system_callback_dispatcher.h
+++ b/webkit/fileapi/file_system_callback_dispatcher.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -9,6 +9,8 @@
 
 #include "base/file_util_proxy.h"
 
+class GURL;
+
 namespace fileapi {
 
 // This class mirrors the callbacks in
@@ -41,7 +43,7 @@ class FileSystemCallbackDispatcher {
   // Callback for opening a file system. Called with a name and root path for
   // the FileSystem when the request is accepted. Used by WebFileSystem API.
   virtual void DidOpenFileSystem(const std::string& name,
-                                 const FilePath& root_path) = 0;
+                                 const GURL& root) = 0;
 
   // Called with an error code when a requested operation has failed.
   virtual void DidFail(base::PlatformFileError error_code) = 0;
diff --git a/webkit/fileapi/file_system_file_util_proxy.cc b/webkit/fileapi/file_system_file_util_proxy.cc
index 0f88ff0..06a61c4 100644
--- a/webkit/fileapi/file_system_file_util_proxy.cc
+++ b/webkit/fileapi/file_system_file_util_proxy.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
diff --git a/webkit/fileapi/file_system_operation.cc b/webkit/fileapi/file_system_operation.cc
index 4ddfd0c..0e258c1 100644
--- a/webkit/fileapi/file_system_operation.cc
+++ b/webkit/fileapi/file_system_operation.cc
@@ -5,6 +5,8 @@
 #include "webkit/fileapi/file_system_operation.h"
 
 #include "base/time.h"
+#include "base/utf_string_conversions.h"
+#include "net/base/escape.h"
 #include "net/url_request/url_request_context.h"
 #include "webkit/fileapi/file_system_callback_dispatcher.h"
 #include "webkit/fileapi/file_system_context.h"
@@ -63,7 +65,7 @@ void FileSystemOperation::OpenFileSystem(
       callback_factory_.NewCallback(&FileSystemOperation::DidGetRootPath));
 }
 
-void FileSystemOperation::CreateFile(const FilePath& path,
+void FileSystemOperation::CreateFile(const GURL& path,
                                      bool exclusive) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
@@ -86,7 +88,7 @@ void FileSystemOperation::CreateFile(const FilePath& path,
                     : &FileSystemOperation::DidEnsureFileExistsNonExclusive));
 }
 
-void FileSystemOperation::CreateDirectory(const FilePath& path,
+void FileSystemOperation::CreateDirectory(const GURL& path,
                                           bool exclusive,
                                           bool recursive) {
 #ifndef NDEBUG
@@ -110,8 +112,8 @@ void FileSystemOperation::CreateDirectory(const FilePath& path,
           &FileSystemOperation::DidFinishFileOperation));
 }
 
-void FileSystemOperation::Copy(const FilePath& src_path,
-                               const FilePath& dest_path) {
+void FileSystemOperation::Copy(const GURL& src_path,
+                               const GURL& dest_path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationCopy;
@@ -149,8 +151,8 @@ void FileSystemOperation::Copy(const FilePath& src_path,
         &FileSystemOperation::DidFinishFileOperation));
 }
 
-void FileSystemOperation::Move(const FilePath& src_path,
-                               const FilePath& dest_path) {
+void FileSystemOperation::Move(const GURL& src_path,
+                               const GURL& dest_path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationMove;
@@ -162,6 +164,8 @@ void FileSystemOperation::Move(const FilePath& src_path,
   FileSystemType src_type;
   FileSystemType dest_type;
 
+  //TODO(ericu): Move alters the source path as well, so we should be checking
+  //both for write!
   if (!VerifyFileSystemPathForRead(src_path, &src_origin_url, &src_type,
         &virtual_path_0) ||
       !VerifyFileSystemPathForWrite(dest_path, true /* create */,
@@ -186,7 +190,7 @@ void FileSystemOperation::Move(const FilePath& src_path,
         &FileSystemOperation::DidFinishFileOperation));
 }
 
-void FileSystemOperation::DirectoryExists(const FilePath& path) {
+void FileSystemOperation::DirectoryExists(const GURL& path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationDirectoryExists;
@@ -207,7 +211,7 @@ void FileSystemOperation::DirectoryExists(const FilePath& path) {
           &FileSystemOperation::DidDirectoryExists));
 }
 
-void FileSystemOperation::FileExists(const FilePath& path) {
+void FileSystemOperation::FileExists(const GURL& path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationFileExists;
@@ -228,7 +232,7 @@ void FileSystemOperation::FileExists(const FilePath& path) {
           &FileSystemOperation::DidFileExists));
 }
 
-void FileSystemOperation::GetMetadata(const FilePath& path) {
+void FileSystemOperation::GetMetadata(const GURL& path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationGetMetadata;
@@ -249,7 +253,7 @@ void FileSystemOperation::GetMetadata(const FilePath& path) {
           &FileSystemOperation::DidGetMetadata));
 }
 
-void FileSystemOperation::ReadDirectory(const FilePath& path) {
+void FileSystemOperation::ReadDirectory(const GURL& path) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationReadDirectory;
@@ -270,7 +274,7 @@ void FileSystemOperation::ReadDirectory(const FilePath& path) {
           &FileSystemOperation::DidReadDirectory));
 }
 
-void FileSystemOperation::Remove(const FilePath& path, bool recursive) {
+void FileSystemOperation::Remove(const GURL& path, bool recursive) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationRemove;
@@ -294,7 +298,7 @@ void FileSystemOperation::Remove(const FilePath& path, bool recursive) {
 
 void FileSystemOperation::Write(
     scoped_refptr<net::URLRequestContext> url_request_context,
-    const FilePath& path,
+    const GURL& path,
     const GURL& blob_url,
     int64 offset) {
 #ifndef NDEBUG
@@ -326,7 +330,7 @@ void FileSystemOperation::Write(
           &FileSystemOperation::OnFileOpenedForWrite));
 }
 
-void FileSystemOperation::Truncate(const FilePath& path, int64 length) {
+void FileSystemOperation::Truncate(const GURL& path, int64 length) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationTruncate;
@@ -347,7 +351,7 @@ void FileSystemOperation::Truncate(const FilePath& path, int64 length) {
           &FileSystemOperation::DidFinishFileOperation));
 }
 
-void FileSystemOperation::TouchFile(const FilePath& path,
+void FileSystemOperation::TouchFile(const GURL& path,
                                     const base::Time& last_access_time,
                                     const base::Time& last_modified_time) {
 #ifndef NDEBUG
@@ -408,14 +412,13 @@ void FileSystemOperation::DidGetRootPath(
     bool success,
     const FilePath& path, const std::string& name) {
   DCHECK(success || path.empty());
-  FilePath result;
+  GURL result;
   // We ignore the path, and return a URL instead.  The point was just to verify
   // that we could create/find the path.
   if (success) {
-    GURL root_url = GetFileSystemRootURI(
+    result = GetFileSystemRootURI(
         file_system_operation_context_.src_origin_url(),
         file_system_operation_context_.src_type());
-    result = FilePath().AppendASCII(root_url.spec());
   }
   dispatcher_->DidOpenFileSystem(name, result);
   delete this;
@@ -537,21 +540,37 @@ void FileSystemOperation::OnFileOpenedForWrite(
 }
 
 bool FileSystemOperation::VerifyFileSystemPathForRead(
-    const FilePath& path, GURL* origin_url, FileSystemType* type,
+    const GURL& path, GURL* origin_url, FileSystemType* type,
     FilePath* virtual_path) {
 
   // If we have no context, we just allow any operations, for testing.
   // TODO(ericu): Revisit this hack for security.
   if (!file_system_context()) {
-    *virtual_path = path;
+#ifdef OS_WIN
+    // On Windows, the path will look like /C:/foo/bar; we need to remove the
+    // leading slash to make it valid.  But if it's empty, we shouldn't do
+    // anything.
+    std::string temp = UnescapeURLComponent(path.path(),
+        UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
+    if (temp.size())
+      temp = temp.substr(1);
+    *virtual_path = FilePath(UTF8ToWide(temp)).NormalizeWindowsPathSeparators();
+#else
+    *virtual_path = FilePath(path.path());
+#endif
     *type = file_system_operation_context_.src_type();
+    *origin_url = file_system_operation_context_.src_origin_url();
     return true;
   }
 
   // We may want do more checks, but for now it just checks if the given
-  // |path| is under the valid FileSystem root path for this host context.
-  if (!file_system_context()->path_manager()->CrackFileSystemPath(
-          path, origin_url, type, virtual_path)) {
+  // URL is valid.
+  if (!CrackFileSystemURL(path, origin_url, type, virtual_path)) {
+    dispatcher_->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
+    return false;
+  }
+  if (!file_system_context()->path_manager()->IsAllowedFileSystemType(
+      *origin_url, *type)) {
     dispatcher_->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
     return false;
   }
@@ -560,19 +579,35 @@ bool FileSystemOperation::VerifyFileSystemPathForRead(
 }
 
 bool FileSystemOperation::VerifyFileSystemPathForWrite(
-    const FilePath& path, bool create, GURL* origin_url, FileSystemType* type,
+    const GURL& path, bool create, GURL* origin_url, FileSystemType* type,
     FilePath* virtual_path) {
 
   // If we have no context, we just allow any operations, for testing.
   // TODO(ericu): Revisit this hack for security.
   if (!file_system_context()) {
-    *virtual_path = path;
+#ifdef OS_WIN
+    // On Windows, the path will look like /C:/foo/bar; we need to remove the
+    // leading slash to make it valid.  But if it's empty, we shouldn't do
+    // anything.
+    std::string temp = UnescapeURLComponent(path.path(),
+        UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
+    if (temp.size())
+      temp = temp.substr(1);
+    *virtual_path = FilePath(UTF8ToWide(temp)).NormalizeWindowsPathSeparators();
+#else
+    *virtual_path = FilePath(path.path());
+#endif
     *type = file_system_operation_context_.dest_type();
+    *origin_url = file_system_operation_context_.dest_origin_url();
     return true;
   }
 
-  if (!file_system_context()->path_manager()->CrackFileSystemPath(
-          path, origin_url, type, virtual_path)) {
+  if (!CrackFileSystemURL(path, origin_url, type, virtual_path)) {
+    dispatcher_->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
+    return false;
+  }
+  if (!file_system_context()->path_manager()->IsAllowedFileSystemType(
+      *origin_url, *type)) {
     dispatcher_->DidFail(base::PLATFORM_FILE_ERROR_SECURITY);
     return false;
   }
diff --git a/webkit/fileapi/file_system_operation.h b/webkit/fileapi/file_system_operation.h
index 5ba585e..8ca3be5 100644
--- a/webkit/fileapi/file_system_operation.h
+++ b/webkit/fileapi/file_system_operation.h
@@ -57,26 +57,26 @@ class FileSystemOperation {
   void OpenFileSystem(const GURL& origin_url,
                       fileapi::FileSystemType type,
                       bool create);
-  void CreateFile(const FilePath& path,
+  void CreateFile(const GURL& path,
                   bool exclusive);
-  void CreateDirectory(const FilePath& path,
+  void CreateDirectory(const GURL& path,
                        bool exclusive,
                        bool recursive);
-  void Copy(const FilePath& src_path,
-            const FilePath& dest_path);
-  void Move(const FilePath& src_path,
-            const FilePath& dest_path);
-  void DirectoryExists(const FilePath& path);
-  void FileExists(const FilePath& path);
-  void GetMetadata(const FilePath& path);
-  void ReadDirectory(const FilePath& path);
-  void Remove(const FilePath& path, bool recursive);
+  void Copy(const GURL& src_path,
+            const GURL& dest_path);
+  void Move(const GURL& src_path,
+            const GURL& dest_path);
+  void DirectoryExists(const GURL& path);
+  void FileExists(const GURL& path);
+  void GetMetadata(const GURL& path);
+  void ReadDirectory(const GURL& path);
+  void Remove(const GURL& path, bool recursive);
   void Write(scoped_refptr<net::URLRequestContext> url_request_context,
-             const FilePath& path,
+             const GURL& path,
              const GURL& blob_url,
              int64 offset);
-  void Truncate(const FilePath& path, int64 length);
-  void TouchFile(const FilePath& path,
+  void Truncate(const GURL& path, int64 length);
+  void TouchFile(const GURL& path,
                  const base::Time& last_access_time,
                  const base::Time& last_modified_time);
 
@@ -143,7 +143,7 @@ class FileSystemOperation {
   // PLATFORM_FILE_ERROR_SECURITY and returns false.
   // (Note: this doesn't delete this when it calls DidFail and returns false;
   // it's the caller's responsibility.)
-  bool VerifyFileSystemPathForRead(const FilePath& path,
+  bool VerifyFileSystemPathForRead(const GURL& path,
                                    GURL* root_url,
                                    FileSystemType* type,
                                    FilePath* virtual_path);
@@ -162,7 +162,7 @@ class FileSystemOperation {
   // DidFail with PLATFORM_FILE_ERROR_SECURITY and returns false.
   // (Note: this doesn't delete this when it calls DidFail and returns false;
   // it's the caller's responsibility.)
-  bool VerifyFileSystemPathForWrite(const FilePath& path,
+  bool VerifyFileSystemPathForWrite(const GURL& path,
                                     bool create,
                                     GURL* root_url,
                                     FileSystemType* type,
diff --git a/webkit/fileapi/file_system_operation_unittest.cc b/webkit/fileapi/file_system_operation_unittest.cc
index 75c9d31..292104b 100644
--- a/webkit/fileapi/file_system_operation_unittest.cc
+++ b/webkit/fileapi/file_system_operation_unittest.cc
@@ -56,6 +56,16 @@ class FileSystemOperationTest : public testing::Test {
   // Common temp base for nondestructive uses.
   ScopedTempDir base_;
 
+  GURL URLForRelativePath(const std::string& path) const {
+    // Only the path will actually get used.
+    return GURL("file://").Resolve(base_.path().value()).Resolve(path);
+  }
+
+  GURL URLForPath(const FilePath& path) const {
+    // Only the path will actually get used.
+    return GURL("file://").Resolve(path.value());
+  }
+
   // For post-operation status.
   int status_;
   base::PlatformFileInfo info_;
@@ -91,7 +101,7 @@ class MockDispatcher : public FileSystemCallbackDispatcher {
     test_->set_entries(entries);
   }
 
-  virtual void DidOpenFileSystem(const std::string&, const FilePath&) {
+  virtual void DidOpenFileSystem(const std::string&, const GURL&) {
     NOTREACHED();
   }
 
@@ -113,12 +123,15 @@ FileSystemOperation* FileSystemOperationTest::operation() {
       kFileSystemTypeTemporary);
   operation->file_system_operation_context()->set_dest_type(
       kFileSystemTypeTemporary);
+  GURL origin_url("fake://fake.foo/");
+  operation->file_system_operation_context()->set_src_origin_url(origin_url);
+  operation->file_system_operation_context()->set_dest_origin_url(origin_url);
   return operation;
 }
 
 TEST_F(FileSystemOperationTest, TestMoveFailureSrcDoesntExist) {
-  FilePath src(base_.path().Append(FILE_PATH_LITERAL("a")));
-  FilePath dest(base_.path().Append(FILE_PATH_LITERAL("b")));
+  GURL src(URLForRelativePath("a"));
+  GURL dest(URLForRelativePath("b"));
   operation()->Move(src, dest);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
@@ -131,7 +144,7 @@ TEST_F(FileSystemOperationTest, TestMoveFailureContainsPath) {
   ASSERT_TRUE(file_util::CreateTemporaryDirInDir(src_dir.path(),
                                                  FILE_PATH_LITERAL("child_dir"),
                                                  &dest_dir_path));
-  operation()->Move(src_dir.path(), dest_dir_path);
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_INVALID_OPERATION, status());
 }
@@ -146,7 +159,7 @@ TEST_F(FileSystemOperationTest, TestMoveFailureSrcDirExistsDestFile) {
   FilePath dest_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &dest_file);
 
-  operation()->Move(src_dir.path(), dest_file);
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY, status());
 }
@@ -161,7 +174,7 @@ TEST_F(FileSystemOperationTest, TestMoveFailureSrcFileExistsDestNonEmptyDir) {
   FilePath child_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &child_file);
 
-  operation()->Move(src_dir.path(), dest_dir.path());
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_EMPTY, status());
 }
@@ -176,7 +189,7 @@ TEST_F(FileSystemOperationTest, TestMoveFailureSrcFileExistsDestDir) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Move(src_file, dest_dir.path());
+  operation()->Move(URLForPath(src_file), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_FILE, status());
 }
@@ -189,7 +202,7 @@ TEST_F(FileSystemOperationTest, TestMoveFailureDestParentDoesntExist) {
       FILE_PATH_LITERAL("NonexistingDir")).Append(
           FILE_PATH_LITERAL("NonexistingFile"));
 
-  operation()->Move(src_dir.path(), nonexisting_file);
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(nonexisting_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 }
@@ -205,7 +218,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcFileAndOverwrite) {
   FilePath dest_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &dest_file);
 
-  operation()->Move(src_file, dest_file);
+  operation()->Move(URLForPath(src_file), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(dest_file));
@@ -221,7 +234,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcFileAndNew) {
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
   FilePath dest_file(dest_dir.path().Append(FILE_PATH_LITERAL("NewFile")));
 
-  operation()->Move(src_file, dest_file);
+  operation()->Move(URLForPath(src_file), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(dest_file));
@@ -234,7 +247,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcDirAndOverwrite) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Move(src_dir.path(), dest_dir.path());
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(file_util::DirectoryExists(src_dir.path()));
@@ -253,7 +266,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcDirAndNew) {
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath dest_dir_path(dir.path().Append(FILE_PATH_LITERAL("NewDirectory")));
 
-  operation()->Move(src_dir.path(), dest_dir_path);
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(file_util::DirectoryExists(src_dir.path()));
@@ -272,7 +285,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcDirRecursive) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Move(src_dir.path(), dest_dir.path());
+  operation()->Move(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(file_util::DirectoryExists(dest_dir.path().Append(
@@ -283,9 +296,7 @@ TEST_F(FileSystemOperationTest, TestMoveSuccessSrcDirRecursive) {
 }
 
 TEST_F(FileSystemOperationTest, TestCopyFailureSrcDoesntExist) {
-  FilePath src(base_.path().Append(FILE_PATH_LITERAL("a")));
-  FilePath dest(base_.path().Append(FILE_PATH_LITERAL("b")));
-  operation()->Copy(src, dest);
+  operation()->Copy(URLForRelativePath("a"), URLForRelativePath("b"));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 }
@@ -297,7 +308,7 @@ TEST_F(FileSystemOperationTest, TestCopyFailureContainsPath) {
   ASSERT_TRUE(file_util::CreateTemporaryDirInDir(src_dir.path(),
                                                  FILE_PATH_LITERAL("child_dir"),
                                                  &dest_dir_path));
-  operation()->Copy(src_dir.path(), dest_dir_path);
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_INVALID_OPERATION, status());
 }
@@ -312,7 +323,7 @@ TEST_F(FileSystemOperationTest, TestCopyFailureSrcDirExistsDestFile) {
   FilePath dest_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &dest_file);
 
-  operation()->Copy(src_dir.path(), dest_file);
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY, status());
 }
@@ -327,7 +338,7 @@ TEST_F(FileSystemOperationTest, TestCopyFailureSrcFileExistsDestNonEmptyDir) {
   FilePath child_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &child_file);
 
-  operation()->Copy(src_dir.path(), dest_dir.path());
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_EMPTY, status());
 }
@@ -342,7 +353,7 @@ TEST_F(FileSystemOperationTest, TestCopyFailureSrcFileExistsDestDir) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Copy(src_file, dest_dir.path());
+  operation()->Copy(URLForPath(src_file), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_FILE, status());
 }
@@ -358,7 +369,7 @@ TEST_F(FileSystemOperationTest, TestCopyFailureDestParentDoesntExist) {
   FilePath nonexisting_file = nonexisting.Append(
       FILE_PATH_LITERAL("DontExistFile"));
 
-  operation()->Copy(src_dir, nonexisting_file);
+  operation()->Copy(URLForPath(src_dir), URLForPath(nonexisting_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 }
@@ -374,7 +385,7 @@ TEST_F(FileSystemOperationTest, TestCopySuccessSrcFileAndOverwrite) {
   FilePath dest_file;
   file_util::CreateTemporaryFileInDir(dest_dir.path(), &dest_file);
 
-  operation()->Copy(src_file, dest_file);
+  operation()->Copy(URLForPath(src_file), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(dest_file));
@@ -390,7 +401,7 @@ TEST_F(FileSystemOperationTest, TestCopySuccessSrcFileAndNew) {
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
   FilePath dest_file(dest_dir.path().Append(FILE_PATH_LITERAL("NewFile")));
 
-  operation()->Copy(src_file, dest_file);
+  operation()->Copy(URLForPath(src_file), URLForPath(dest_file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(dest_file));
@@ -403,7 +414,7 @@ TEST_F(FileSystemOperationTest, TestCopySuccessSrcDirAndOverwrite) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Copy(src_dir.path(), dest_dir.path());
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
@@ -421,7 +432,7 @@ TEST_F(FileSystemOperationTest, TestCopySuccessSrcDirAndNew) {
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath dest_dir(dir.path().Append(FILE_PATH_LITERAL("NewDirectory")));
 
-  operation()->Copy(src_dir.path(), dest_dir);
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_dir));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(file_util::DirectoryExists(dest_dir));
@@ -439,7 +450,7 @@ TEST_F(FileSystemOperationTest, TestCopySuccessSrcDirRecursive) {
   ScopedTempDir dest_dir;
   ASSERT_TRUE(dest_dir.CreateUniqueTempDir());
 
-  operation()->Copy(src_dir.path(), dest_dir.path());
+  operation()->Copy(URLForPath(src_dir.path()), URLForPath(dest_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(file_util::DirectoryExists(dest_dir.path().Append(
@@ -456,7 +467,7 @@ TEST_F(FileSystemOperationTest, TestCreateFileFailure) {
   FilePath file;
 
   file_util::CreateTemporaryFileInDir(dir.path(), &file);
-  operation()->CreateFile(file, true);
+  operation()->CreateFile(URLForPath(file), true);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_EXISTS, status());
 }
@@ -468,7 +479,7 @@ TEST_F(FileSystemOperationTest, TestCreateFileSuccessFileExists) {
   FilePath file;
   file_util::CreateTemporaryFileInDir(dir.path(), &file);
 
-  operation()->CreateFile(file, false);
+  operation()->CreateFile(URLForPath(file), false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(file));
@@ -479,7 +490,7 @@ TEST_F(FileSystemOperationTest, TestCreateFileSuccessExclusive) {
   ScopedTempDir dir;
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath file = dir.path().Append(FILE_PATH_LITERAL("FileDoesntExist"));
-  operation()->CreateFile(file, true);
+  operation()->CreateFile(URLForPath(file), true);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(FileExists(file));
@@ -490,7 +501,7 @@ TEST_F(FileSystemOperationTest, TestCreateFileSuccessFileDoesntExist) {
   ScopedTempDir dir;
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath file = dir.path().Append(FILE_PATH_LITERAL("FileDoesntExist"));
-  operation()->CreateFile(file, false);
+  operation()->CreateFile(URLForPath(file), false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 }
@@ -502,7 +513,7 @@ TEST_F(FileSystemOperationTest,
       FILE_PATH_LITERAL("DirDoesntExist")));
   FilePath nonexisting_file = nonexisting.Append(
       FILE_PATH_LITERAL("FileDoesntExist"));
-  operation()->CreateDirectory(nonexisting_file, false, false);
+  operation()->CreateDirectory(URLForPath(nonexisting_file), false, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 }
@@ -511,7 +522,7 @@ TEST_F(FileSystemOperationTest, TestCreateDirFailureDirExists) {
   // Exclusive and dir existing at path.
   ScopedTempDir src_dir;
   ASSERT_TRUE(src_dir.CreateUniqueTempDir());
-  operation()->CreateDirectory(src_dir.path(), true, false);
+  operation()->CreateDirectory(URLForPath(src_dir.path()), true, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_EXISTS, status());
 }
@@ -522,7 +533,7 @@ TEST_F(FileSystemOperationTest, TestCreateDirFailureFileExists) {
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath file;
   file_util::CreateTemporaryFileInDir(dir.path(), &file);
-  operation()->CreateDirectory(file, true, false);
+  operation()->CreateDirectory(URLForPath(file), true, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_EXISTS, status());
 }
@@ -531,14 +542,14 @@ TEST_F(FileSystemOperationTest, TestCreateDirSuccess) {
   // Dir exists and exclusive is false.
   ScopedTempDir dir;
   ASSERT_TRUE(dir.CreateUniqueTempDir());
-  operation()->CreateDirectory(dir.path(), false, false);
+  operation()->CreateDirectory(URLForPath(dir.path()), false, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
   // Dir doesn't exist.
   FilePath nonexisting_dir_path(base_.path().Append(
       FILE_PATH_LITERAL("nonexistingdir")));
-  operation()->CreateDirectory(nonexisting_dir_path, false, false);
+  operation()->CreateDirectory(URLForPath(nonexisting_dir_path), false, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(file_util::DirectoryExists(nonexisting_dir_path));
@@ -549,7 +560,7 @@ TEST_F(FileSystemOperationTest, TestCreateDirSuccessExclusive) {
   FilePath nonexisting_dir_path(base_.path().Append(
       FILE_PATH_LITERAL("nonexistingdir")));
 
-  operation()->CreateDirectory(nonexisting_dir_path, true, false);
+  operation()->CreateDirectory(URLForPath(nonexisting_dir_path), true, false);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(file_util::DirectoryExists(nonexisting_dir_path));
@@ -558,16 +569,16 @@ TEST_F(FileSystemOperationTest, TestCreateDirSuccessExclusive) {
 TEST_F(FileSystemOperationTest, TestExistsAndMetadataFailure) {
   FilePath nonexisting_dir_path(base_.path().Append(
       FILE_PATH_LITERAL("nonexistingdir")));
-  operation()->GetMetadata(nonexisting_dir_path);
+  operation()->GetMetadata(URLForPath(nonexisting_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 
-  operation()->FileExists(nonexisting_dir_path);
+  operation()->FileExists(URLForPath(nonexisting_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 
   file_util::EnsureEndsWithSeparator(&nonexisting_dir_path);
-  operation()->DirectoryExists(nonexisting_dir_path);
+  operation()->DirectoryExists(URLForPath(nonexisting_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 }
@@ -576,11 +587,11 @@ TEST_F(FileSystemOperationTest, TestExistsAndMetadataSuccess) {
   ScopedTempDir dir;
   ASSERT_TRUE(dir.CreateUniqueTempDir());
 
-  operation()->DirectoryExists(dir.path());
+  operation()->DirectoryExists(URLForPath(dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
-  operation()->GetMetadata(dir.path());
+  operation()->GetMetadata(URLForPath(dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_TRUE(info().is_directory);
@@ -588,11 +599,11 @@ TEST_F(FileSystemOperationTest, TestExistsAndMetadataSuccess) {
 
   FilePath file;
   file_util::CreateTemporaryFileInDir(dir.path(), &file);
-  operation()->FileExists(file);
+  operation()->FileExists(URLForPath(file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
-  operation()->GetMetadata(file);
+  operation()->GetMetadata(URLForPath(file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(info().is_directory);
@@ -602,13 +613,13 @@ TEST_F(FileSystemOperationTest, TestExistsAndMetadataSuccess) {
 TEST_F(FileSystemOperationTest, TestTypeMismatchErrors) {
   ScopedTempDir dir;
   ASSERT_TRUE(dir.CreateUniqueTempDir());
-  operation()->FileExists(dir.path());
+  operation()->FileExists(URLForPath(dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_FILE, status());
 
   FilePath file;
   ASSERT_TRUE(file_util::CreateTemporaryFileInDir(dir.path(), &file));
-  operation()->DirectoryExists(file);
+  operation()->DirectoryExists(URLForPath(file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_A_DIRECTORY, status());
 }
@@ -618,7 +629,7 @@ TEST_F(FileSystemOperationTest, TestReadDirFailure) {
   FilePath nonexisting_dir_path(base_.path().Append(
       FILE_PATH_LITERAL("NonExistingDir")));
   file_util::EnsureEndsWithSeparator(&nonexisting_dir_path);
-  operation()->ReadDirectory(nonexisting_dir_path);
+  operation()->ReadDirectory(URLForPath(nonexisting_dir_path));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 
@@ -627,7 +638,7 @@ TEST_F(FileSystemOperationTest, TestReadDirFailure) {
   ASSERT_TRUE(dir.CreateUniqueTempDir());
   FilePath file;
   file_util::CreateTemporaryFileInDir(dir.path(), &file);
-  operation()->ReadDirectory(file);
+  operation()->ReadDirectory(URLForPath(file));
   MessageLoop::current()->RunAllPending();
   // TODO(kkanetkar) crbug.com/54309 to change the error code.
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
@@ -646,7 +657,7 @@ TEST_F(FileSystemOperationTest, TestReadDirSuccess) {
   ASSERT_TRUE(file_util::CreateTemporaryDirInDir(
       parent_dir.path(), FILE_PATH_LITERAL("child_dir"), &child_dir));
 
-  operation()->ReadDirectory(parent_dir.path());
+  operation()->ReadDirectory(URLForPath(parent_dir.path()));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationStatusNotSet, status());
   EXPECT_EQ(2u, entries().size());
@@ -668,7 +679,7 @@ TEST_F(FileSystemOperationTest, TestRemoveFailure) {
       FILE_PATH_LITERAL("NonExistingDir")));
   file_util::EnsureEndsWithSeparator(&nonexisting);
 
-  operation()->Remove(nonexisting, false /* recursive */);
+  operation()->Remove(URLForPath(nonexisting), false /* recursive */);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND, status());
 
@@ -686,7 +697,7 @@ TEST_F(FileSystemOperationTest, TestRemoveFailure) {
   ASSERT_TRUE(file_util::CreateTemporaryDirInDir(
       parent_dir.path(), FILE_PATH_LITERAL("child_dir"), &child_dir));
 
-  operation()->Remove(parent_dir.path(), false /* recursive */);
+  operation()->Remove(URLForPath(parent_dir.path()), false /* recursive */);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_NOT_EMPTY,
             status());
@@ -697,7 +708,7 @@ TEST_F(FileSystemOperationTest, TestRemoveSuccess) {
   ASSERT_TRUE(empty_dir.CreateUniqueTempDir());
   EXPECT_TRUE(file_util::DirectoryExists(empty_dir.path()));
 
-  operation()->Remove(empty_dir.path(), false /* recursive */);
+  operation()->Remove(URLForPath(empty_dir.path()), false /* recursive */);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(file_util::DirectoryExists(empty_dir.path()));
@@ -715,7 +726,7 @@ TEST_F(FileSystemOperationTest, TestRemoveSuccess) {
   ASSERT_TRUE(file_util::CreateTemporaryDirInDir(
       parent_dir.path(), FILE_PATH_LITERAL("child_dir"), &child_dir));
 
-  operation()->Remove(parent_dir.path(), true /* recursive */);
+  operation()->Remove(URLForPath(parent_dir.path()), true /* recursive */);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(file_util::DirectoryExists(parent_dir.path()));
@@ -733,7 +744,7 @@ TEST_F(FileSystemOperationTest, TestTruncate) {
             file_util::WriteFile(file, test_data, data_size));
 
   // Check that its length is the size of the data written.
-  operation()->GetMetadata(file);
+  operation()->GetMetadata(URLForPath(file));
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
   EXPECT_FALSE(info().is_directory);
@@ -741,7 +752,7 @@ TEST_F(FileSystemOperationTest, TestTruncate) {
 
   // Extend the file by truncating it.
   int length = 17;
-  operation()->Truncate(file, length);
+  operation()->Truncate(URLForPath(file), length);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
@@ -762,7 +773,7 @@ TEST_F(FileSystemOperationTest, TestTruncate) {
 
   // Shorten the file by truncating it.
   length = 3;
-  operation()->Truncate(file, length);
+  operation()->Truncate(URLForPath(file), length);
   MessageLoop::current()->RunAllPending();
   EXPECT_EQ(kFileOperationSucceeded, status());
 
diff --git a/webkit/fileapi/file_system_operation_write_unittest.cc b/webkit/fileapi/file_system_operation_write_unittest.cc
index 57f72fc..3c36168 100644
--- a/webkit/fileapi/file_system_operation_write_unittest.cc
+++ b/webkit/fileapi/file_system_operation_write_unittest.cc
@@ -10,7 +10,6 @@
 
 #include "webkit/fileapi/file_system_operation.h"
 
-#include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_temp_dir.h"
@@ -61,6 +60,16 @@ class FileSystemOperationWriteTest : public testing::Test {
   virtual void TearDown();
 
  protected:
+  GURL URLForRelativePath(const std::string& path) const {
+    // Only the path will actually get used.
+    return GURL("file://").Resolve(file_.value()).Resolve(path);
+  }
+
+  GURL URLForPath(const FilePath& path) const {
+    // Only the path will actually get used.
+    return GURL("file://").Resolve(path.value());
+  }
+
   MessageLoop loop_;
 
   ScopedTempDir dir_;
@@ -122,7 +131,7 @@ class MockDispatcher : public FileSystemCallbackDispatcher {
     ADD_FAILURE();
   }
 
-  virtual void DidOpenFileSystem(const std::string&, const FilePath&) {
+  virtual void DidOpenFileSystem(const std::string&, const GURL&) {
     ADD_FAILURE();
   }
 
@@ -170,7 +179,7 @@ TEST_F(FileSystemOperationWriteTest, TestWriteSuccess) {
   url_request_context->blob_storage_controller()->
       RegisterBlobUrl(blob_url, blob_data);
 
-  operation()->Write(url_request_context, file_, blob_url, 0);
+  operation()->Write(url_request_context, URLForPath(file_), blob_url, 0);
   MessageLoop::current()->Run();
 
   url_request_context->blob_storage_controller()->UnregisterBlobUrl(blob_url);
@@ -190,7 +199,7 @@ TEST_F(FileSystemOperationWriteTest, TestWriteZero) {
   url_request_context->blob_storage_controller()->
       RegisterBlobUrl(blob_url, blob_data);
 
-  operation()->Write(url_request_context, file_, blob_url, 0);
+  operation()->Write(url_request_context, URLForPath(file_), blob_url, 0);
   MessageLoop::current()->Run();
 
   url_request_context->blob_storage_controller()->UnregisterBlobUrl(blob_url);
@@ -204,7 +213,8 @@ TEST_F(FileSystemOperationWriteTest, TestWriteInvalidBlobUrl) {
   scoped_refptr<TestURLRequestContext> url_request_context(
       new TestURLRequestContext());
 
-  operation()->Write(url_request_context, file_, GURL("blob:invalid"), 0);
+  operation()->Write(url_request_context, URLForPath(file_),
+      GURL("blob:invalid"), 0);
   MessageLoop::current()->Run();
 
   EXPECT_EQ(0, bytes_written());
@@ -223,7 +233,7 @@ TEST_F(FileSystemOperationWriteTest, TestWriteInvalidFile) {
       RegisterBlobUrl(blob_url, blob_data);
 
   operation()->Write(url_request_context,
-                     FilePath(FILE_PATH_LITERAL("/nonexist")), blob_url, 0);
+                     URLForRelativePath("nonexist"), blob_url, 0);
   MessageLoop::current()->Run();
 
   url_request_context->blob_storage_controller()->UnregisterBlobUrl(blob_url);
@@ -243,7 +253,7 @@ TEST_F(FileSystemOperationWriteTest, TestWriteDir) {
   url_request_context->blob_storage_controller()->
       RegisterBlobUrl(blob_url, blob_data);
 
-  operation()->Write(url_request_context, dir_.path(), blob_url, 0);
+  operation()->Write(url_request_context, URLForPath(dir_.path()), blob_url, 0);
   MessageLoop::current()->Run();
 
   url_request_context->blob_storage_controller()->UnregisterBlobUrl(blob_url);
diff --git a/webkit/fileapi/file_system_path_manager.cc b/webkit/fileapi/file_system_path_manager.cc
index 558dc31..16fc60b 100644
--- a/webkit/fileapi/file_system_path_manager.cc
+++ b/webkit/fileapi/file_system_path_manager.cc
@@ -100,83 +100,6 @@ FilePath FileSystemPathManager::GetFileSystemRootPathOnFileThread(
   }
 }
 
-bool FileSystemPathManager::CrackFileSystemPath(
-    const FilePath& path, GURL* origin_url, FileSystemType* type,
-    FilePath* virtual_path) const {
-  // TODO(ericu):
-  // Paths come in here [for now] as a URL, followed by a virtual path in
-  // platform format.  For example, on Windows, this will look like
-  // filesystem:http://www.example.com/temporary/\path\to\file.txt.
-  // A potentially dangerous malicious path on Windows might look like:
-  // filesystem:http://www.example.com/temporary/foo/../../\path\to\file.txt.
-  // This code is ugly, but will get cleaned up as we fix the calling side.
-  // Eventually there won't be a distinction between a filesystem path and a
-  // filesystem URL--they'll all be URLs.
-  // We should be passing these to WebKit as string, not FilePath, for ease of
-  // manipulation, or possibly as GURL/KURL.
-
-  std::string path_as_string;
-#ifdef OS_WIN
-  path_as_string = WideToUTF8(path.value());
-#else
-  path_as_string = path.value();
-#endif
-  GURL path_as_url(path_as_string);
-
-  FilePath local_path;
-  GURL local_url;
-  FileSystemType local_type;
-  if (!CrackFileSystemURL(path_as_url, &local_url, &local_type, &local_path))
-    return false;
-
-#if defined(FILE_PATH_USES_WIN_SEPARATORS)
-  // TODO(ericu): This puts the separators back to windows-standard; they come
-  // out of the above code as '/' no matter the platform.  Long-term, we'll
-  // want to let the underlying FileSystemFileUtil implementation do this part,
-  // since they won't all need it.
-  local_path = local_path.NormalizeWindowsPathSeparators();
-#endif
-
-  // Check if file access to this type of file system is allowed
-  // for this origin.
-  switch (local_type) {
-    case kFileSystemTypeTemporary:
-    case kFileSystemTypePersistent:
-      if (!sandbox_provider_->IsAccessAllowed(local_url))
-        return false;
-      break;
-    case kFileSystemTypeLocal:
-      if (!local_provider_.get() ||
-          !local_provider_->IsAccessAllowed(local_url)) {
-        return false;
-      }
-      break;
-    case kFileSystemTypeUnknown:
-    default:
-      NOTREACHED();
-      return false;
-  }
-  // Any paths that include parent references are considered invalid.
-  // These should have been taken care of in CrackFileSystemURL.
-  DCHECK(!local_path.ReferencesParent());
-
-  // The given |local_path| seems valid. Populates the |origin_url|, |type|
-  // and |virtual_path| if they are given.
-
-  if (origin_url) {
-    *origin_url = local_url;
-  }
-
-  if (type)
-    *type = local_type;
-
-  if (virtual_path) {
-    *virtual_path = local_path;
-  }
-
-  return true;
-}
-
 bool FileSystemPathManager::IsAllowedScheme(const GURL& url) const {
   // Basically we only accept http or https. We allow file:// URLs
   // only if --allow-file-access-from-files flag is given.
@@ -212,6 +135,29 @@ bool FileSystemPathManager::IsRestrictedFileName(
   }
 }
 
+// Checks if an origin has access to a particular filesystem type.
+bool FileSystemPathManager::IsAllowedFileSystemType(
+    GURL origin, FileSystemType type) {
+  switch (type) {
+    case kFileSystemTypeTemporary:
+    case kFileSystemTypePersistent:
+      if (!sandbox_provider_->IsAccessAllowed(origin))
+        return false;
+      break;
+    case kFileSystemTypeLocal:
+      if (!local_provider_.get() ||
+          !local_provider_->IsAccessAllowed(origin)) {
+        return false;
+      }
+      break;
+    case kFileSystemTypeUnknown:
+    default:
+      NOTREACHED();
+      return false;
+  }
+  return true;
+}
+
 }  // namespace fileapi
 
 COMPILE_ASSERT(int(WebFileSystem::TypeTemporary) == \
diff --git a/webkit/fileapi/file_system_path_manager.h b/webkit/fileapi/file_system_path_manager.h
index 5a9613a..19718ae 100644
--- a/webkit/fileapi/file_system_path_manager.h
+++ b/webkit/fileapi/file_system_path_manager.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -68,14 +68,6 @@ class FileSystemPathManager {
       FileSystemType type,
       const FilePath& virtual_path,
       bool create);
-  // Cracks the given |path|, retrieves the information embedded in the path
-  // and populates |origin_url|, |type| and |virtual_path|.  The |virtual_path|
-  // is a sandboxed path in the file system, i.e. the relative path to the
-  // filesystem root for the given domain and type.
-  bool CrackFileSystemPath(const FilePath& path,
-                           GURL* origin_url,
-                           FileSystemType* type,
-                           FilePath* virtual_path) const;
 
   // Returns true if the given |url|'s scheme is allowed to access
   // filesystem.
@@ -89,6 +81,9 @@ class FileSystemPathManager {
   bool IsRestrictedFileName(FileSystemType type,
                             const FilePath& filename);
 
+  // Checks if an origin has access to a particular filesystem type.
+  bool IsAllowedFileSystemType(GURL origin, FileSystemType type);
+
   SandboxMountPointProvider* sandbox_provider() const {
     return sandbox_provider_.get();
   }
diff --git a/webkit/fileapi/file_system_path_manager_unittest.cc b/webkit/fileapi/file_system_path_manager_unittest.cc
index fee38c1..8a99b84 100644
--- a/webkit/fileapi/file_system_path_manager_unittest.cc
+++ b/webkit/fileapi/file_system_path_manager_unittest.cc
@@ -228,11 +228,6 @@ class FileSystemPathManagerTest : public testing::Test {
     return root_path_callback_status_;
   }
 
-  bool CheckValidFileSystemPath(FileSystemPathManager* manager,
-                                const FilePath& path) {
-    return manager->CrackFileSystemPath(path, NULL, NULL, NULL);
-  }
-
   FilePath data_path() { return data_dir_.path(); }
   FilePath file_system_path() {
     return data_dir_.path().Append(
@@ -367,89 +362,6 @@ TEST_F(FileSystemPathManagerTest, GetRootPathFileURIWithAllowFlag) {
   }
 }
 
-TEST_F(FileSystemPathManagerTest, VirtualPathFromFileSystemPathTest) {
-  scoped_ptr<FileSystemPathManager> manager(NewPathManager(false, false));
-  GURL root_url = GetFileSystemRootURI(
-      GURL("http://foo.com/"), fileapi::kFileSystemTypeTemporary);
-  FilePath root_path = FilePath().AppendASCII(root_url.spec());
-
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kPathToVirtualPathTestCases); ++i) {
-    SCOPED_TRACE(testing::Message() << "PathToVirtualPath #"
-                 << i << " " << kPathToVirtualPathTestCases[i]);
-    FilePath absolute_path;
-    // TODO(ericu): Clean this up when we've got more sane path-handling.
-    // This hack is necessary because root_path is actually a URL [ending with a
-    // forward slash], and AppendASCII("") on Windows will delete the trailing
-    // slash, making the path invalid as far as CrackFileSystemPath is
-    // concerned.
-    if (strlen(kPathToVirtualPathTestCases[i]))
-      absolute_path = root_path.AppendASCII(
-          kPathToVirtualPathTestCases[i]);
-    else
-      absolute_path = root_path;
-    FilePath virtual_path;
-    EXPECT_TRUE(manager->CrackFileSystemPath(absolute_path, NULL, NULL,
-                                             &virtual_path));
-
-    FilePath test_case_path;
-    test_case_path = test_case_path.AppendASCII(
-        kPathToVirtualPathTestCases[i]);
-    EXPECT_EQ(test_case_path.value(), virtual_path.value());
-  }
-}
-
-TEST_F(FileSystemPathManagerTest, TypeFromFileSystemPathTest) {
-  scoped_ptr<FileSystemPathManager> manager(NewPathManager(false, false));
-
-  fileapi::FileSystemType type;
-
-  GURL root_url = GetFileSystemRootURI(
-      GURL("http://foo.com/"), fileapi::kFileSystemTypeTemporary);
-  FilePath root_path = FilePath().AppendASCII(root_url.spec());
-  FilePath path = root_path.AppendASCII("test");
-  EXPECT_TRUE(manager->CrackFileSystemPath(path, NULL, &type, NULL));
-  EXPECT_EQ(fileapi::kFileSystemTypeTemporary, type);
-
-  root_url = GetFileSystemRootURI(
-      GURL("http://foo.com/"), fileapi::kFileSystemTypePersistent);
-  root_path = FilePath().AppendASCII(root_url.spec());
-  path = root_path.AppendASCII("test");
-  EXPECT_TRUE(manager->CrackFileSystemPath(path, NULL, &type, NULL));
-  EXPECT_EQ(fileapi::kFileSystemTypePersistent, type);
-}
-
-TEST_F(FileSystemPathManagerTest, CheckValidPath) {
-  scoped_ptr<FileSystemPathManager> manager(NewPathManager(false, false));
-  GURL root_url = GetFileSystemRootURI(
-      GURL("http://foo.com/"), fileapi::kFileSystemTypePersistent);
-  FilePath root_path = FilePath().AppendASCII(root_url.spec());
-
-  // The root path must be valid, but upper directories or directories
-  // that are not in our temporary or persistent directory must be
-  // evaluated invalid.
-  EXPECT_TRUE(CheckValidFileSystemPath(manager.get(), root_path));
-  EXPECT_FALSE(CheckValidFileSystemPath(manager.get(), root_path.DirName()));
-  EXPECT_FALSE(CheckValidFileSystemPath(manager.get(),
-                                        root_path.DirName().DirName()));
-  EXPECT_FALSE(CheckValidFileSystemPath(manager.get(),
-                                        root_path.DirName().DirName()
-                                            .AppendASCII("ArbitraryName")
-                                            .AppendASCII("chrome-dummy")));
-
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kCheckValidPathTestCases); ++i) {
-    SCOPED_TRACE(testing::Message() << "CheckValidPath #" << i << " "
-                 << kCheckValidPathTestCases[i].path);
-    FilePath path(kCheckValidPathTestCases[i].path);
-#ifdef FILE_PATH_USES_WIN_SEPARATORS
-    path = path.NormalizeWindowsPathSeparators();
-#endif
-    if (!path.IsAbsolute())
-      path = root_path.Append(path);
-    EXPECT_EQ(kCheckValidPathTestCases[i].expected_valid,
-              CheckValidFileSystemPath(manager.get(), path));
-  }
-}
-
 TEST_F(FileSystemPathManagerTest, IsRestrictedName) {
   scoped_ptr<FileSystemPathManager> manager(NewPathManager(false, false));
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kIsRestrictedNameTestCases); ++i) {
diff --git a/webkit/fileapi/file_system_util.cc b/webkit/fileapi/file_system_util.cc
index a15c2a8..75013da 100644
--- a/webkit/fileapi/file_system_util.cc
+++ b/webkit/fileapi/file_system_util.cc
@@ -88,17 +88,17 @@ bool CrackFileSystemURL(const GURL& url, GURL* origin_url, FileSystemType* type,
   while (!path.empty() && path[0] == '/')
     path.erase(0, 1);
 
-#if defined(OS_WIN)
-  const FilePath::StringType sys_path = base::SysUTF8ToWide(path);
-#elif defined(OS_POSIX)
-  const FilePath::StringType sys_path = path;
-#endif
   if (origin_url)
     *origin_url = origin;
   if (type)
     *type = file_system_type;
   if (file_path)
-    *file_path = FilePath(sys_path);
+#if defined(OS_WIN)
+    *file_path = FilePath(base::SysUTF8ToWide(path)).
+        NormalizeWindowsPathSeparators();
+#elif defined(OS_POSIX)
+    *file_path = FilePath(path);
+#endif
 
   return true;
 }
diff --git a/webkit/fileapi/file_system_util_unittest.cc b/webkit/fileapi/file_system_util_unittest.cc
index e08fec7..41863ae 100644
--- a/webkit/fileapi/file_system_util_unittest.cc
+++ b/webkit/fileapi/file_system_util_unittest.cc
@@ -29,7 +29,8 @@ TEST_F(FileSystemUtilTest, ParsePersistent) {
       "filesystem:http://chromium.org/persistent/directory/file"));
   EXPECT_EQ("http://chromium.org/", origin_url_.spec());
   EXPECT_EQ(kFileSystemTypePersistent, type_);
-  EXPECT_EQ(FILE_PATH_LITERAL("directory/file"), file_path_.value());
+  EXPECT_EQ(FILE_PATH_LITERAL("file"), file_path_.BaseName().value());
+  EXPECT_EQ(FILE_PATH_LITERAL("directory"), file_path_.DirName().value());
 }
 
 TEST_F(FileSystemUtilTest, ParseTemporary) {
@@ -37,7 +38,8 @@ TEST_F(FileSystemUtilTest, ParseTemporary) {
       "filesystem:http://chromium.org/temporary/directory/file"));
   EXPECT_EQ("http://chromium.org/", origin_url_.spec());
   EXPECT_EQ(kFileSystemTypeTemporary, type_);
-  EXPECT_EQ(FILE_PATH_LITERAL("directory/file"), file_path_.value());
+  EXPECT_EQ(FILE_PATH_LITERAL("file"), file_path_.BaseName().value());
+  EXPECT_EQ(FILE_PATH_LITERAL("directory"), file_path_.DirName().value());
 }
 
 TEST_F(FileSystemUtilTest, EnsureFilePathIsRelative) {
@@ -45,7 +47,8 @@ TEST_F(FileSystemUtilTest, EnsureFilePathIsRelative) {
       "filesystem:http://chromium.org/temporary/////directory/file"));
   EXPECT_EQ("http://chromium.org/", origin_url_.spec());
   EXPECT_EQ(kFileSystemTypeTemporary, type_);
-  EXPECT_EQ(FILE_PATH_LITERAL("directory/file"), file_path_.value());
+  EXPECT_EQ(FILE_PATH_LITERAL("file"), file_path_.BaseName().value());
+  EXPECT_EQ(FILE_PATH_LITERAL("directory"), file_path_.DirName().value());
   EXPECT_FALSE(file_path_.IsAbsolute());
 }
 
@@ -59,7 +62,8 @@ TEST_F(FileSystemUtilTest, RejectBadSchemes) {
 TEST_F(FileSystemUtilTest, UnescapePath) {
   ASSERT_TRUE(CrackFileSystemURL(
       "filesystem:http://chromium.org/persistent/%7Echromium/space%20bar"));
-  EXPECT_EQ(FILE_PATH_LITERAL("~chromium/space bar"), file_path_.value());
+  EXPECT_EQ(FILE_PATH_LITERAL("space bar"), file_path_.BaseName().value());
+  EXPECT_EQ(FILE_PATH_LITERAL("~chromium"), file_path_.DirName().value());
 }
 
 TEST_F(FileSystemUtilTest, RejectBadType) {
diff --git a/webkit/fileapi/webfilewriter_base.cc b/webkit/fileapi/webfilewriter_base.cc
index cf2a7bc..1e0e8a3 100644
--- a/webkit/fileapi/webfilewriter_base.cc
+++ b/webkit/fileapi/webfilewriter_base.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -13,8 +13,8 @@
 namespace fileapi {
 
 WebFileWriterBase::WebFileWriterBase(
-     const WebKit::WebString& path, WebKit::WebFileWriterClient* client)
-  : path_(webkit_glue::WebStringToFilePath(path)),
+     const GURL& path, WebKit::WebFileWriterClient* client)
+  : path_(path),
     client_(client),
     operation_(kOperationNone),
     cancel_state_(kCancelNotInProgress) {
diff --git a/webkit/fileapi/webfilewriter_base.h b/webkit/fileapi/webfilewriter_base.h
index f47b383..3601256 100644
--- a/webkit/fileapi/webfilewriter_base.h
+++ b/webkit/fileapi/webfilewriter_base.h
@@ -1,16 +1,14 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_FILEAPI_WEBFILEWRITER_BASE_H_
 #define WEBKIT_FILEAPI_WEBFILEWRITER_BASE_H_
 
-#include "base/file_path.h"
 #include "base/platform_file.h"
+#include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFileWriter.h"
 
-class GURL;
-
 namespace WebKit {
 class WebFileWriterClient;
 class WebString;
@@ -22,7 +20,7 @@ namespace fileapi {
 class WebFileWriterBase : public WebKit::WebFileWriter {
  public:
   WebFileWriterBase(
-      const WebKit::WebString& path, WebKit::WebFileWriterClient* client);
+      const GURL& path, WebKit::WebFileWriterClient* client);
   virtual ~WebFileWriterBase();
 
   // WebFileWriter implementation
@@ -34,8 +32,8 @@ class WebFileWriterBase : public WebKit::WebFileWriter {
   // Derived classes must provide these methods to asynchronously perform
   // the requested operation, and they must call the appropiate DidSomething
   // method upon completion and as progress is made in the Write case.
-  virtual void DoTruncate(const FilePath& path, int64 offset) = 0;
-  virtual void DoWrite(const FilePath& path, const GURL& blob_url,
+  virtual void DoTruncate(const GURL& path, int64 offset) = 0;
+  virtual void DoWrite(const GURL& path, const GURL& blob_url,
                        int64 offset) = 0;
   virtual void DoCancel() = 0;
 
@@ -58,7 +56,7 @@ class WebFileWriterBase : public WebKit::WebFileWriter {
 
   void FinishCancel();
 
-  FilePath path_;
+  GURL path_;
   WebKit::WebFileWriterClient* client_;
   OperationType operation_;
   CancelState cancel_state_;
diff --git a/webkit/fileapi/webfilewriter_base_unittest.cc b/webkit/fileapi/webfilewriter_base_unittest.cc
index 7a07cd2..43164e7 100644
--- a/webkit/fileapi/webfilewriter_base_unittest.cc
+++ b/webkit/fileapi/webfilewriter_base_unittest.cc
@@ -31,16 +31,8 @@ const int kMultiFileWrite_Offset = 3;
 const int kCancelFileWriteBeforeCompletion_Offset = 4;
 const int kCancelFileWriteAfterCompletion_Offset = 5;
 
-std::string mock_path_as_ascii() {
-  return std::string("MockPath");
-}
-
-string16 mock_path_as_string16() {
-  return ASCIIToUTF16(mock_path_as_ascii());
-}
-
-FilePath mock_path_as_file_path() {
-  return FilePath().AppendASCII(mock_path_as_ascii());
+GURL mock_path_as_gurl() {
+  return GURL("MockPath");
 }
 
 }  // namespace
@@ -48,32 +40,32 @@ FilePath mock_path_as_file_path() {
 class TestableFileWriter : public WebFileWriterBase {
  public:
   explicit TestableFileWriter(WebKit::WebFileWriterClient* client)
-      : WebFileWriterBase(mock_path_as_string16(), client) {
+      : WebFileWriterBase(mock_path_as_gurl(), client) {
     reset();
   }
 
   void reset() {
     received_truncate_ = false;
-    received_truncate_path_ = FilePath();
+    received_truncate_path_ = GURL();
     received_truncate_offset_ = kNoOffset;
     received_write_ = false;
-    received_write_path_ = FilePath();
+    received_write_path_ = GURL();
     received_write_offset_ = kNoOffset;
     received_write_blob_url_ = GURL();
     received_cancel_ = false;
   }
 
   bool received_truncate_;
-  FilePath received_truncate_path_;
+  GURL received_truncate_path_;
   int64 received_truncate_offset_;
   bool received_write_;
-  FilePath received_write_path_;
+  GURL received_write_path_;
   GURL received_write_blob_url_;
   int64 received_write_offset_;
   bool received_cancel_;
 
  protected:
-  virtual void DoTruncate(const FilePath& path, int64 offset) {
+  virtual void DoTruncate(const GURL& path, int64 offset) {
     received_truncate_ = true;
     received_truncate_path_ = path;
     received_truncate_offset_ = offset;
@@ -95,7 +87,7 @@ class TestableFileWriter : public WebFileWriterBase {
     }
   }
 
-  virtual void DoWrite(const FilePath& path, const GURL& blob_url,
+  virtual void DoWrite(const GURL& path, const GURL& blob_url,
                        int64 offset) {
     received_write_ = true;
     received_write_path_ = path;
@@ -205,8 +197,8 @@ TEST_F(FileWriterTest, BasicFileWrite) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_write_);
-  EXPECT_EQ(testable_writer_->received_write_path_.value(),
-            mock_path_as_file_path().value());
+  EXPECT_EQ(testable_writer_->received_write_path_,
+            mock_path_as_gurl());
   EXPECT_EQ(kBasicFileWrite_Offset,
             testable_writer_->received_write_offset_);
   EXPECT_EQ(kBlobUrl, testable_writer_->received_write_blob_url_);
@@ -227,8 +219,8 @@ TEST_F(FileWriterTest, BasicFileTruncate) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_truncate_);
-  EXPECT_EQ(mock_path_as_file_path().value(),
-            testable_writer_->received_truncate_path_.value());
+  EXPECT_EQ(mock_path_as_gurl(),
+            testable_writer_->received_truncate_path_);
   EXPECT_EQ(kBasicFileTruncate_Offset,
             testable_writer_->received_truncate_offset_);
   EXPECT_FALSE(testable_writer_->received_write_);
@@ -247,8 +239,8 @@ TEST_F(FileWriterTest, ErrorFileWrite) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_write_);
-  EXPECT_EQ(testable_writer_->received_write_path_.value(),
-            mock_path_as_file_path().value());
+  EXPECT_EQ(testable_writer_->received_write_path_,
+            mock_path_as_gurl());
   EXPECT_EQ(kErrorFileWrite_Offset,
             testable_writer_->received_write_offset_);
   EXPECT_EQ(kBlobUrl, testable_writer_->received_write_blob_url_);
@@ -268,8 +260,8 @@ TEST_F(FileWriterTest, ErrorFileTruncate) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_truncate_);
-  EXPECT_EQ(mock_path_as_file_path().value(),
-            testable_writer_->received_truncate_path_.value());
+  EXPECT_EQ(mock_path_as_gurl(),
+            testable_writer_->received_truncate_path_);
   EXPECT_EQ(kErrorFileTruncate_Offset,
             testable_writer_->received_truncate_offset_);
   EXPECT_FALSE(testable_writer_->received_write_);
@@ -289,8 +281,8 @@ TEST_F(FileWriterTest, MultiFileWrite) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_write_);
-  EXPECT_EQ(testable_writer_->received_write_path_.value(),
-            mock_path_as_file_path().value());
+  EXPECT_EQ(testable_writer_->received_write_path_,
+            mock_path_as_gurl());
   EXPECT_EQ(kMultiFileWrite_Offset,
             testable_writer_->received_write_offset_);
   EXPECT_EQ(kBlobUrl, testable_writer_->received_write_blob_url_);
@@ -312,8 +304,8 @@ TEST_F(FileWriterTest, CancelFileWriteBeforeCompletion) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_write_);
-  EXPECT_EQ(testable_writer_->received_write_path_.value(),
-            mock_path_as_file_path().value());
+  EXPECT_EQ(testable_writer_->received_write_path_,
+            mock_path_as_gurl());
   EXPECT_EQ(kCancelFileWriteBeforeCompletion_Offset,
             testable_writer_->received_write_offset_);
   EXPECT_EQ(kBlobUrl, testable_writer_->received_write_blob_url_);
@@ -336,8 +328,8 @@ TEST_F(FileWriterTest, CancelFileWriteAfterCompletion) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_write_);
-  EXPECT_EQ(testable_writer_->received_write_path_.value(),
-            mock_path_as_file_path().value());
+  EXPECT_EQ(testable_writer_->received_write_path_,
+            mock_path_as_gurl());
   EXPECT_EQ(kCancelFileWriteAfterCompletion_Offset,
             testable_writer_->received_write_offset_);
   EXPECT_EQ(kBlobUrl, testable_writer_->received_write_blob_url_);
@@ -359,8 +351,8 @@ TEST_F(FileWriterTest, CancelFileTruncate) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_truncate_);
-  EXPECT_EQ(mock_path_as_file_path().value(),
-            testable_writer_->received_truncate_path_.value());
+  EXPECT_EQ(mock_path_as_gurl(),
+            testable_writer_->received_truncate_path_);
   EXPECT_EQ(kCancelFileTruncate_Offset,
             testable_writer_->received_truncate_offset_);
   EXPECT_TRUE(testable_writer_->received_cancel_);
@@ -379,8 +371,8 @@ TEST_F(FileWriterTest, CancelFailedTruncate) {
 
   // Check that the derived class gets called correctly.
   EXPECT_TRUE(testable_writer_->received_truncate_);
-  EXPECT_EQ(mock_path_as_file_path().value(),
-            testable_writer_->received_truncate_path_.value());
+  EXPECT_EQ(mock_path_as_gurl(),
+            testable_writer_->received_truncate_path_);
   EXPECT_EQ(kCancelFailedTruncate_Offset,
             testable_writer_->received_truncate_offset_);
   EXPECT_TRUE(testable_writer_->received_cancel_);
diff --git a/webkit/plugins/ppapi/file_callbacks.cc b/webkit/plugins/ppapi/file_callbacks.cc
index 92d443b..6706d47 100644
--- a/webkit/plugins/ppapi/file_callbacks.cc
+++ b/webkit/plugins/ppapi/file_callbacks.cc
@@ -1,10 +1,9 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/plugins/ppapi/file_callbacks.h"
 
-#include "base/file_path.h"
 #include "base/logging.h"
 #include "ppapi/c/dev/ppb_file_system_dev.h"
 #include "ppapi/c/dev/pp_file_info_dev.h"
@@ -76,12 +75,12 @@ void FileCallbacks::DidReadDirectory(
 }
 
 void FileCallbacks::DidOpenFileSystem(const std::string&,
-                                      const FilePath& root_path) {
+                                      const GURL& root_url) {
   if (callback_->completed())
     return;
 
   DCHECK(file_system_);
-  file_system_->set_root_path(root_path);
+  file_system_->set_root_url(root_url);
   file_system_->set_opened(true);
 
   callback_->Run(PP_OK);
diff --git a/webkit/plugins/ppapi/file_callbacks.h b/webkit/plugins/ppapi/file_callbacks.h
index e0a129f..4bdaa1d 100644
--- a/webkit/plugins/ppapi/file_callbacks.h
+++ b/webkit/plugins/ppapi/file_callbacks.h
@@ -45,7 +45,7 @@ class FileCallbacks : public fileapi::FileSystemCallbackDispatcher {
   virtual void DidReadDirectory(
       const std::vector<base::FileUtilProxy::Entry>& entries, bool has_more);
   virtual void DidOpenFileSystem(const std::string&,
-                                 const FilePath& root_path);
+                                 const GURL& root_url);
   virtual void DidFail(base::PlatformFileError error_code);
   virtual void DidWrite(int64 bytes, bool complete);
 
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.cc b/webkit/plugins/ppapi/mock_plugin_delegate.cc
index f81e9c2..a9da765 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.cc
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.cc
@@ -87,20 +87,20 @@ bool MockPluginDelegate::OpenFileSystem(
 }
 
 bool MockPluginDelegate::MakeDirectory(
-    const FilePath& path,
+    const GURL& path,
     bool recursive,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   return false;
 }
 
 bool MockPluginDelegate::Query(
-    const FilePath& path,
+    const GURL& path,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   return false;
 }
 
 bool MockPluginDelegate::Touch(
-    const FilePath& path,
+    const GURL& path,
     const base::Time& last_access_time,
     const base::Time& last_modified_time,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
@@ -108,20 +108,20 @@ bool MockPluginDelegate::Touch(
 }
 
 bool MockPluginDelegate::Delete(
-    const FilePath& path,
+    const GURL& path,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   return false;
 }
 
 bool MockPluginDelegate::Rename(
-    const FilePath& file_path,
-    const FilePath& new_file_path,
+    const GURL& file_path,
+    const GURL& new_file_path,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   return false;
 }
 
 bool MockPluginDelegate::ReadDirectory(
-    const FilePath& directory_path,
+    const GURL& directory_path,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   return false;
 }
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.h b/webkit/plugins/ppapi/mock_plugin_delegate.h
index dd5e8f1..78d59a2 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.h
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.h
@@ -44,22 +44,22 @@ class MockPluginDelegate : public PluginDelegate {
       long long size,
       fileapi::FileSystemCallbackDispatcher* dispatcher);
   virtual bool MakeDirectory(
-      const FilePath& path,
+      const GURL& path,
       bool recursive,
       fileapi::FileSystemCallbackDispatcher* dispatcher);
-  virtual bool Query(const FilePath& path,
+  virtual bool Query(const GURL& path,
                      fileapi::FileSystemCallbackDispatcher* dispatcher);
-  virtual bool Touch(const FilePath& path,
+  virtual bool Touch(const GURL& path,
                      const base::Time& last_access_time,
                      const base::Time& last_modified_time,
                      fileapi::FileSystemCallbackDispatcher* dispatcher);
-  virtual bool Delete(const FilePath& path,
+  virtual bool Delete(const GURL& path,
                       fileapi::FileSystemCallbackDispatcher* dispatcher);
-  virtual bool Rename(const FilePath& file_path,
-                      const FilePath& new_file_path,
+  virtual bool Rename(const GURL& file_path,
+                      const GURL& new_file_path,
                       fileapi::FileSystemCallbackDispatcher* dispatcher);
   virtual bool ReadDirectory(
-      const FilePath& directory_path,
+      const GURL& directory_path,
       fileapi::FileSystemCallbackDispatcher* dispatcher);
   virtual base::PlatformFileError OpenFile(const PepperFilePath& path,
                                            int flags,
diff --git a/webkit/plugins/ppapi/plugin_delegate.h b/webkit/plugins/ppapi/plugin_delegate.h
index 33fb820..786e924 100644
--- a/webkit/plugins/ppapi/plugin_delegate.h
+++ b/webkit/plugins/ppapi/plugin_delegate.h
@@ -288,22 +288,22 @@ class PluginDelegate {
       long long size,
       fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
   virtual bool MakeDirectory(
-      const FilePath& path,
+      const GURL& path,
       bool recursive,
       fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
-  virtual bool Query(const FilePath& path,
+  virtual bool Query(const GURL& path,
                      fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
-  virtual bool Touch(const FilePath& path,
+  virtual bool Touch(const GURL& path,
                      const base::Time& last_access_time,
                      const base::Time& last_modified_time,
                      fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
-  virtual bool Delete(const FilePath& path,
+  virtual bool Delete(const GURL& path,
                       fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
-  virtual bool Rename(const FilePath& file_path,
-                      const FilePath& new_file_path,
+  virtual bool Rename(const GURL& file_path,
+                      const GURL& new_file_path,
                       fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
   virtual bool ReadDirectory(
-      const FilePath& directory_path,
+      const GURL& directory_path,
       fileapi::FileSystemCallbackDispatcher* dispatcher) = 0;
 
   virtual base::PlatformFileError OpenFile(const PepperFilePath& path,
diff --git a/webkit/plugins/ppapi/ppb_directory_reader_impl.cc b/webkit/plugins/ppapi/ppb_directory_reader_impl.cc
index e704b3f..77935cf 100644
--- a/webkit/plugins/ppapi/ppb_directory_reader_impl.cc
+++ b/webkit/plugins/ppapi/ppb_directory_reader_impl.cc
@@ -113,7 +113,7 @@ int32_t PPB_DirectoryReader_Impl::GetNextEntry(
   PP_Resource resource_id = GetReferenceNoAddRef();
   DCHECK(resource_id != 0);
   if (!instance->delegate()->ReadDirectory(
-          directory_ref_->GetSystemPath(),
+          directory_ref_->GetFileSystemURL(),
           new FileCallbacks(instance->module()->AsWeakPtr(),
                             resource_id,
                             callback, NULL, NULL, this)))
diff --git a/webkit/plugins/ppapi/ppb_file_ref_impl.cc b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
index c2ec5b2..b048caf 100644
--- a/webkit/plugins/ppapi/ppb_file_ref_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
@@ -6,6 +6,7 @@
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
+#include "googleurl/src/gurl.h"
 #include "ppapi/c/pp_errors.h"
 #include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/file_callbacks.h"
@@ -126,7 +127,7 @@ int32_t MakeDirectory(PP_Resource directory_ref_id,
 
   PluginInstance* instance = file_system->instance();
   if (!instance->delegate()->MakeDirectory(
-          directory_ref->GetSystemPath(), PPBoolToBool(make_ancestors),
+          directory_ref->GetFileSystemURL(), PPBoolToBool(make_ancestors),
           new FileCallbacks(instance->module()->AsWeakPtr(), directory_ref_id,
                             callback, NULL, NULL, NULL)))
     return PP_ERROR_FAILED;
@@ -150,7 +151,8 @@ int32_t Touch(PP_Resource file_ref_id,
 
   PluginInstance* instance = file_system->instance();
   if (!instance->delegate()->Touch(
-          file_ref->GetSystemPath(), base::Time::FromDoubleT(last_access_time),
+          file_ref->GetFileSystemURL(),
+          base::Time::FromDoubleT(last_access_time),
           base::Time::FromDoubleT(last_modified_time),
           new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
                             callback, NULL, NULL, NULL)))
@@ -173,7 +175,7 @@ int32_t Delete(PP_Resource file_ref_id,
 
   PluginInstance* instance = file_system->instance();
   if (!instance->delegate()->Delete(
-          file_ref->GetSystemPath(),
+          file_ref->GetFileSystemURL(),
           new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
                             callback, NULL, NULL, NULL)))
     return PP_ERROR_FAILED;
@@ -204,7 +206,7 @@ int32_t Rename(PP_Resource file_ref_id,
   // http://crbug.com/67624
   PluginInstance* instance = file_system->instance();
   if (!instance->delegate()->Rename(
-          file_ref->GetSystemPath(), new_file_ref->GetSystemPath(),
+          file_ref->GetFileSystemURL(), new_file_ref->GetFileSystemURL(),
           new FileCallbacks(instance->module()->AsWeakPtr(), file_ref_id,
                             callback, NULL, NULL, NULL)))
     return PP_ERROR_FAILED;
@@ -320,22 +322,25 @@ std::string PPB_FileRef_Impl::GetPath() const {
 }
 
 FilePath PPB_FileRef_Impl::GetSystemPath() const {
-  if (GetFileSystemType() == PP_FILESYSTEMTYPE_EXTERNAL)
-    return system_path_;
+  if (GetFileSystemType() != PP_FILESYSTEMTYPE_EXTERNAL) {
+    NOTREACHED();
+    return FilePath();
+  }
+  return system_path_;
+}
 
-  // Since |virtual_path_| starts with a '/', it is considered an absolute path
-  // on POSIX systems. We need to remove the '/' before calling Append() or we
-  // will run into a DCHECK.
-  FilePath virtual_file_path(
-#if defined(OS_WIN)
-      UTF8ToWide(virtual_path_.substr(1))
-#elif defined(OS_POSIX)
-      virtual_path_.substr(1)
-#else
-#error "Unsupported platform."
-#endif
-  );
-  return file_system_->root_path().Append(virtual_file_path);
+GURL PPB_FileRef_Impl::GetFileSystemURL() const {
+  if (GetFileSystemType() != PP_FILESYSTEMTYPE_LOCALPERSISTENT &&
+      GetFileSystemType() != PP_FILESYSTEMTYPE_LOCALTEMPORARY) {
+    NOTREACHED();
+    return GURL();
+  }
+  if (!virtual_path_.size())
+    return file_system_->root_url();
+  // Since |virtual_path_| starts with a '/', it looks like an absolute path.
+  // We need to trim off the '/' before calling Resolve, as FileSystem URLs
+  // start with a storage type identifier that looks like a path segment.
+  return file_system_->root_url().Resolve(virtual_path_.substr(1));
 }
 
 }  // namespace ppapi
diff --git a/webkit/plugins/ppapi/ppb_file_ref_impl.h b/webkit/plugins/ppapi/ppb_file_ref_impl.h
index f006991..234e150 100644
--- a/webkit/plugins/ppapi/ppb_file_ref_impl.h
+++ b/webkit/plugins/ppapi/ppb_file_ref_impl.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/file_path.h"
+#include "googleurl/src/gurl.h"
 #include "ppapi/c/dev/ppb_file_ref_dev.h"
 #include "webkit/plugins/ppapi/resource.h"
 
@@ -52,6 +53,9 @@ class PPB_FileRef_Impl : public Resource {
   // Returns the system path corresponding to this file.
   FilePath GetSystemPath() const;
 
+  // Returns the FileSystem API URL corresponding to this file.
+  GURL GetFileSystemURL() const;
+
  private:
   scoped_refptr<PPB_FileSystem_Impl> file_system_;
   std::string virtual_path_;  // UTF-8 encoded
diff --git a/webkit/plugins/ppapi/ppb_file_system_impl.h b/webkit/plugins/ppapi/ppb_file_system_impl.h
index 3ee3756..b381f56 100644
--- a/webkit/plugins/ppapi/ppb_file_system_impl.h
+++ b/webkit/plugins/ppapi/ppb_file_system_impl.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -6,7 +6,7 @@
 #define WEBKIT_PLUGINS_PPAPI_PPB_FILE_SYSTEM_IMPL_H_
 
 #include "base/basictypes.h"
-#include "base/file_path.h"
+#include "googleurl/src/gurl.h"
 #include "ppapi/c/dev/pp_file_info_dev.h"
 #include "webkit/plugins/ppapi/resource.h"
 
@@ -28,8 +28,8 @@ class PPB_FileSystem_Impl : public Resource {
 
   PluginInstance* instance() { return instance_; }
   PP_FileSystemType_Dev type() { return type_; }
-  const FilePath& root_path() const { return root_path_; }
-  void set_root_path(const FilePath& root_path) { root_path_ = root_path; }
+  const GURL& root_url() const { return root_url_; }
+  void set_root_url(const GURL& root_url) { root_url_ = root_url; }
   bool opened() const { return opened_; }
   void set_opened(bool opened) { opened_ = opened; }
   bool called_open() const { return called_open_; }
@@ -38,7 +38,7 @@ class PPB_FileSystem_Impl : public Resource {
  private:
   PluginInstance* instance_;
   PP_FileSystemType_Dev type_;
-  FilePath root_path_;
+  GURL root_url_;
   bool opened_;
   bool called_open_;
 
diff --git a/webkit/tools/test_shell/simple_file_system.cc b/webkit/tools/test_shell/simple_file_system.cc
index ecbc6d5..ff634eeb 100644
--- a/webkit/tools/test_shell/simple_file_system.cc
+++ b/webkit/tools/test_shell/simple_file_system.cc
@@ -95,13 +95,13 @@ class SimpleFileSystemCallbackDispatcher
   }
 
   virtual void DidOpenFileSystem(
-      const std::string& name, const FilePath& path) {
+      const std::string& name, const GURL& root) {
     DCHECK(file_system_);
-    if (path.empty())
+    if (!root.is_valid())
       callbacks_->didFail(WebKit::WebFileErrorSecurity);
     else
       callbacks_->didOpenFileSystem(
-          UTF8ToUTF16(name), webkit_glue::FilePathToWebString(path));
+          WebString::fromUTF8(name), WebString::fromUTF8(root.spec()));
   }
 
   virtual void DidFail(base::PlatformFileError error_code) {
@@ -168,80 +168,58 @@ void SimpleFileSystem::OpenFileSystem(
 void SimpleFileSystem::move(
     const WebString& src_path,
     const WebString& dest_path, WebFileSystemCallbacks* callbacks) {
-  FilePath dest_filepath(webkit_glue::WebStringToFilePath(dest_path));
-  FilePath src_filepath(webkit_glue::WebStringToFilePath(src_path));
-
-  GetNewOperation(callbacks)->Move(src_filepath, dest_filepath);
+  GetNewOperation(callbacks)->Move(GURL(src_path), GURL(dest_path));
 }
 
 void SimpleFileSystem::copy(
     const WebString& src_path, const WebString& dest_path,
     WebFileSystemCallbacks* callbacks) {
-  FilePath dest_filepath(webkit_glue::WebStringToFilePath(dest_path));
-  FilePath src_filepath(webkit_glue::WebStringToFilePath(src_path));
-
-  GetNewOperation(callbacks)->Copy(src_filepath, dest_filepath);
+  GetNewOperation(callbacks)->Copy(GURL(src_path), GURL(dest_path));
 }
 
 void SimpleFileSystem::remove(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->Remove(filepath, false /* recursive */);
+  GetNewOperation(callbacks)->Remove(GURL(path), false /* recursive */);
 }
 
 void SimpleFileSystem::removeRecursively(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->Remove(filepath, true /* recursive */);
+  GetNewOperation(callbacks)->Remove(GURL(path), true /* recursive */);
 }
 
 void SimpleFileSystem::readMetadata(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->GetMetadata(filepath);
+  GetNewOperation(callbacks)->GetMetadata(GURL(path));
 }
 
 void SimpleFileSystem::createFile(
     const WebString& path, bool exclusive, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->CreateFile(filepath, exclusive);
+  GetNewOperation(callbacks)->CreateFile(GURL(path), exclusive);
 }
 
 void SimpleFileSystem::createDirectory(
     const WebString& path, bool exclusive, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->CreateDirectory(filepath, exclusive, false);
+  GetNewOperation(callbacks)->CreateDirectory(GURL(path), exclusive, false);
 }
 
 void SimpleFileSystem::fileExists(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->FileExists(filepath);
+  GetNewOperation(callbacks)->FileExists(GURL(path));
 }
 
 void SimpleFileSystem::directoryExists(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->DirectoryExists(filepath);
+  GetNewOperation(callbacks)->DirectoryExists(GURL(path));
 }
 
 void SimpleFileSystem::readDirectory(
     const WebString& path, WebFileSystemCallbacks* callbacks) {
-  FilePath filepath(webkit_glue::WebStringToFilePath(path));
-
-  GetNewOperation(callbacks)->ReadDirectory(filepath);
+  GetNewOperation(callbacks)->ReadDirectory(GURL(path));
 }
 
 WebFileWriter* SimpleFileSystem::createFileWriter(
     const WebString& path, WebFileWriterClient* client) {
-  return new SimpleFileWriter(path, client, file_system_context_.get());
+  return new SimpleFileWriter(GURL(path), client, file_system_context_.get());
 }
 
 FileSystemOperation* SimpleFileSystem::GetNewOperation(
diff --git a/webkit/tools/test_shell/simple_file_writer.cc b/webkit/tools/test_shell/simple_file_writer.cc
index 9304978..657d247 100644
--- a/webkit/tools/test_shell/simple_file_writer.cc
+++ b/webkit/tools/test_shell/simple_file_writer.cc
@@ -45,7 +45,7 @@ class SimpleFileWriter::IOThreadProxy
   virtual ~IOThreadProxy() {
   }
 
-  void Truncate(const FilePath& path, int64 offset) {
+  void Truncate(const GURL& path, int64 offset) {
     if (!io_thread_->BelongsToCurrentThread()) {
       io_thread_->PostTask(FROM_HERE, NewRunnableMethod(
           this, &IOThreadProxy::Truncate, path, offset));
@@ -56,7 +56,7 @@ class SimpleFileWriter::IOThreadProxy
     operation_->Truncate(path, offset);
   }
 
-  void Write(const FilePath& path, const GURL& blob_url, int64 offset) {
+  void Write(const GURL& path, const GURL& blob_url, int64 offset) {
     if (!io_thread_->BelongsToCurrentThread()) {
       io_thread_->PostTask(FROM_HERE, NewRunnableMethod(
           this, &IOThreadProxy::Write, path, blob_url, offset));
@@ -118,7 +118,7 @@ class SimpleFileWriter::IOThreadProxy
 
     virtual void DidOpenFileSystem(
         const std::string& name,
-        const FilePath& root_path) {
+        const GURL& root) {
       NOTREACHED();
     }
 
@@ -181,7 +181,7 @@ class SimpleFileWriter::IOThreadProxy
 
 
 SimpleFileWriter::SimpleFileWriter(
-    const WebString& path,
+    const GURL& path,
     WebFileWriterClient* client,
     FileSystemContext* file_system_context)
   : WebFileWriterBase(path, client),
@@ -191,12 +191,12 @@ SimpleFileWriter::SimpleFileWriter(
 SimpleFileWriter::~SimpleFileWriter() {
 }
 
-void SimpleFileWriter::DoTruncate(const FilePath& path, int64 offset) {
+void SimpleFileWriter::DoTruncate(const GURL& path, int64 offset) {
   io_thread_proxy_->Truncate(path, offset);
 }
 
 void SimpleFileWriter::DoWrite(
-    const FilePath& path, const GURL& blob_url, int64 offset) {
+    const GURL& path, const GURL& blob_url, int64 offset) {
   io_thread_proxy_->Write(path, blob_url, offset);
 }
 
diff --git a/webkit/tools/test_shell/simple_file_writer.h b/webkit/tools/test_shell/simple_file_writer.h
index 6ef27b9..9ea2da5 100644
--- a/webkit/tools/test_shell/simple_file_writer.h
+++ b/webkit/tools/test_shell/simple_file_writer.h
@@ -22,7 +22,7 @@ class SimpleFileWriter : public fileapi::WebFileWriterBase,
                          public base::SupportsWeakPtr<SimpleFileWriter> {
  public:
   SimpleFileWriter(
-      const WebKit::WebString& path,
+      const GURL& path,
       WebKit::WebFileWriterClient* client,
       fileapi::FileSystemContext* file_system_context);
   virtual ~SimpleFileWriter();
@@ -38,8 +38,8 @@ class SimpleFileWriter : public fileapi::WebFileWriterBase,
 
  protected:
   // WebFileWriterBase overrides
-  virtual void DoTruncate(const FilePath& path, int64 offset);
-  virtual void DoWrite(const FilePath& path, const GURL& blob_url,
+  virtual void DoTruncate(const GURL& path, int64 offset);
+  virtual void DoWrite(const GURL& path, const GURL& blob_url,
                        int64 offset);
   virtual void DoCancel();