Revert of Modify test case to support streaming operation in sandbox file system. (patchset #6 of https://codereview.chromium.org/491813002/)

Reason for revert:
This is breaking fast/filesystem/op-copy.html in Blink:
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=fast/filesystem/op-copy.html

Original issue's description:
> Modify test case to support streaming operation in sandbox file system.
>
> BUG=360088
> TEST=content_unittests passed
>
> Committed: https://chromium.googlesource.com/chromium/src/+/2332db94ec6c42aaa3d66f5226a4c17b85c1553e

TBR=tzik@chromium.org,iseki@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=360088

Review URL: https://codereview.chromium.org/510323003

Cr-Commit-Position: refs/heads/master@{#292367}

3 files changed, 10 insertions, 14 deletions

diff --git a/content/browser/fileapi/file_system_operation_impl_unittest.cc b/content/browser/fileapi/file_system_operation_impl_unittest.cc
index 1b6c5c4..afbe664 100644
--- a/content/browser/fileapi/file_system_operation_impl_unittest.cc
+++ b/content/browser/fileapi/file_system_operation_impl_unittest.cc
@@ -277,7 +277,7 @@ class FileSystemOperationImplTest
   }
 
  private:
-  base::MessageLoopForIO message_loop_;
+  base::MessageLoop message_loop_;
   scoped_refptr<QuotaManager> quota_manager_;
   scoped_refptr<QuotaManagerProxy> quota_manager_proxy_;
 
@@ -553,11 +553,7 @@ TEST_F(FileSystemOperationImplTest, TestCopyFailureSrcFileExistsDestDir) {
                            FileSystemOperationRunner::CopyProgressCallback(),
                            RecordStatusCallback());
   base::RunLoop().RunUntilIdle();
-  EXPECT_EQ(3, quota_manager_proxy()->notify_storage_accessed_count());
-
-  EXPECT_EQ(1, change_observer()->get_and_reset_create_directory_count());
-  EXPECT_EQ(1, change_observer()->get_and_reset_remove_directory_count());
-  EXPECT_EQ(base::File::FILE_ERROR_NOT_A_DIRECTORY, status());
+  EXPECT_EQ(base::File::FILE_ERROR_INVALID_OPERATION, status());
   EXPECT_TRUE(change_observer()->HasNoChange());
 }
 
@@ -608,8 +604,9 @@ TEST_F(FileSystemOperationImplTest, TestCopySuccessSrcFileAndOverwrite) {
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(base::File::FILE_OK, status());
   EXPECT_TRUE(FileExists("dest"));
-  EXPECT_EQ(4, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(2, quota_manager_proxy()->notify_storage_accessed_count());
 
+  EXPECT_EQ(1, change_observer()->get_and_reset_modify_file_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
 }
 
@@ -623,9 +620,9 @@ TEST_F(FileSystemOperationImplTest, TestCopySuccessSrcFileAndNew) {
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(base::File::FILE_OK, status());
   EXPECT_TRUE(FileExists("new"));
-  EXPECT_EQ(4, quota_manager_proxy()->notify_storage_accessed_count());
+  EXPECT_EQ(2, quota_manager_proxy()->notify_storage_accessed_count());
 
-  EXPECT_EQ(1, change_observer()->get_and_reset_create_file_count());
+  EXPECT_EQ(1, change_observer()->get_and_reset_create_file_from_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
 }
 
@@ -645,8 +642,8 @@ TEST_F(FileSystemOperationImplTest, TestCopySuccessSrcDirAndOverwrite) {
   EXPECT_FALSE(DirectoryExists("dest/src"));
   EXPECT_GE(quota_manager_proxy()->notify_storage_accessed_count(), 3);
 
-  EXPECT_EQ(1, change_observer()->get_and_reset_create_directory_count());
   EXPECT_EQ(1, change_observer()->get_and_reset_remove_directory_count());
+  EXPECT_EQ(1, change_observer()->get_and_reset_create_directory_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
 }
 
@@ -687,9 +684,9 @@ TEST_F(FileSystemOperationImplTest, TestCopySuccessSrcDirRecursive) {
   // For recursive copy we may record multiple read access.
   EXPECT_GE(quota_manager_proxy()->notify_storage_accessed_count(), 1);
 
-  EXPECT_EQ(1, change_observer()->get_and_reset_create_file_count());
   EXPECT_EQ(2, change_observer()->get_and_reset_create_directory_count());
   EXPECT_EQ(1, change_observer()->get_and_reset_remove_directory_count());
+  EXPECT_EQ(1, change_observer()->get_and_reset_create_file_from_count());
   EXPECT_TRUE(change_observer()->HasNoChange());
 }
 
diff --git a/content/browser/fileapi/obfuscated_file_util_unittest.cc b/content/browser/fileapi/obfuscated_file_util_unittest.cc
index 0cbda88..0c41e8a 100644
--- a/content/browser/fileapi/obfuscated_file_util_unittest.cc
+++ b/content/browser/fileapi/obfuscated_file_util_unittest.cc
@@ -144,8 +144,7 @@ bool HasFileSystemType(ObfuscatedFileUtil::AbstractOriginEnumerator* enumerator,
 class ObfuscatedFileUtilTest : public testing::Test {
  public:
   ObfuscatedFileUtilTest()
-      : message_loop_(base::MessageLoop::TYPE_IO),
-        origin_(GURL("http://www.example.com")),
+      : origin_(GURL("http://www.example.com")),
         type_(storage::kFileSystemTypeTemporary),
         weak_factory_(this),
         sandbox_file_system_(origin_, type_),
diff --git a/webkit/browser/fileapi/sandbox_file_system_backend.cc b/webkit/browser/fileapi/sandbox_file_system_backend.cc
index 8ab5de1..4aa9595 100644
--- a/webkit/browser/fileapi/sandbox_file_system_backend.cc
+++ b/webkit/browser/fileapi/sandbox_file_system_backend.cc
@@ -128,7 +128,7 @@ bool SandboxFileSystemBackend::SupportsStreaming(
 
 bool SandboxFileSystemBackend::HasInplaceCopyImplementation(
     storage::FileSystemType type) const {
-  return false;
+  return true;
 }
 
 scoped_ptr<storage::FileStreamReader>