Add LocalFileToDataURL to webkit_support.

I'm going to use this to get
http/tests/security/local-user-CSS-from-remote.html
passing.  Instead of trying to load a file:/// URL for the
user style sheet, use a data: URL.  This matches what happens
in Chromium.

Review URL: http://codereview.chromium.org/3425004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59459 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 45 insertions, 5 deletions

diff --git a/webkit/support/webkit_support.cc b/webkit/support/webkit_support.cc
index 66d2c66..0d4d72a 100644
--- a/webkit/support/webkit_support.cc
+++ b/webkit/support/webkit_support.cc
@@ -5,6 +5,7 @@
 #include "webkit/support/webkit_support.h"
 
 #include "base/at_exit.h"
+#include "base/base64.h"
 #include "base/command_line.h"
 #include "base/debug_util.h"
 #include "base/file_path.h"
@@ -407,9 +408,26 @@ WebURL RewriteLayoutTestsURL(const std::string& utf8_url) {
 }
 
 bool SetCurrentDirectoryForFileURL(const WebKit::WebURL& fileUrl) {
-  FilePath localPath;
-  return net::FileURLToFilePath(fileUrl, &localPath)
-      && file_util::SetCurrentDirectory(localPath.DirName());
+  FilePath local_path;
+  return net::FileURLToFilePath(fileUrl, &local_path)
+      && file_util::SetCurrentDirectory(local_path.DirName());
+}
+
+WebURL LocalFileToDataURL(const WebURL& fileUrl) {
+  FilePath local_path;
+  if (!net::FileURLToFilePath(fileUrl, &local_path))
+    return WebURL();
+
+  std::string contents;
+  if (!file_util::ReadFileToString(local_path, &contents))
+    return WebURL();
+
+  std::string contents_base64;
+  if (!base::Base64Encode(contents, &contents_base64))
+    return WebURL();
+
+  const char kDataUrlPrefix[] = "data:text/css;charset=utf-8;base64,";
+  return WebURL(GURL(kDataUrlPrefix + contents_base64));
 }
 
 int64 GetCurrentTimeInMillisecond() {
diff --git a/webkit/support/webkit_support.h b/webkit/support/webkit_support.h
index c8b7978..745b979 100644
--- a/webkit/support/webkit_support.h
+++ b/webkit/support/webkit_support.h
@@ -120,6 +120,9 @@ WebKit::WebURL RewriteLayoutTestsURL(const std::string& utf8_url);
 // Set the directory of specified file: URL as the current working directory.
 bool SetCurrentDirectoryForFileURL(const WebKit::WebURL& fileUrl);
 
+// Convert a file:/// URL to a base64 encoded data: URL.
+WebKit::WebURL LocalFileToDataURL(const WebKit::WebURL& fileUrl);
+
 // -------- Time
 int64 GetCurrentTimeInMillisecond();
 
diff --git a/webkit/tools/test_shell/layout_test_controller.cc b/webkit/tools/test_shell/layout_test_controller.cc
index 79dbc04..8d7088f 100644
--- a/webkit/tools/test_shell/layout_test_controller.cc
+++ b/webkit/tools/test_shell/layout_test_controller.cc
@@ -8,13 +8,16 @@
 
 #include "webkit/tools/test_shell/layout_test_controller.h"
 
+#include "base/base64.h"
 #include "base/basictypes.h"
 #include "base/file_path.h"
+#include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
+#include "net/base/net_util.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAnimationController.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebBindings.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebConsoleMessage.h"
@@ -664,12 +667,28 @@ void LayoutTestController::setUserStyleSheetEnabled(
 
 void LayoutTestController::setUserStyleSheetLocation(
     const CppArgumentList& args, CppVariant* result) {
+  result->SetNull();
+
   if (args.size() > 0 && args[0].isString()) {
     GURL location(TestShell::RewriteLocalUrl(args[0].ToString()));
+
+    FilePath local_path;
+    if (!net::FileURLToFilePath(location, &local_path))
+      return;
+
+    std::string contents;
+    if (!file_util::ReadFileToString(local_path, &contents))
+      return;
+
+    std::string contents_base64;
+    if (!base::Base64Encode(contents, &contents_base64))
+      return;
+
+    const char kDataUrlPrefix[] = "data:text/css;charset=utf-8;base64,";
+    location = GURL(kDataUrlPrefix + contents_base64);
+
     shell_->delegate()->SetUserStyleSheetLocation(location);
   }
-
-  result->SetNull();
 }
 
 void LayoutTestController::setAuthorAndUserStylesEnabled(