Stop returning the true root path of each filesystem from openFileSystem....

content/common/file_system/webfilesystem_callback_dispatcher.cc

 // 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 "content/common/file_system/webfilesystem_callback_dispatcher.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_util_proxy.h"
@@ skipping 23 matching lines @@
 
 void WebFileSystemCallbackDispatcher::DidReadMetadata(
     const base::PlatformFileInfo& file_info) {
   WebFileInfo web_file_info;
   web_file_info.modificationTime = file_info.last_modified.ToDoubleT();
   web_file_info.length = file_info.size;
   if (file_info.is_directory)
     web_file_info.type = WebFileInfo::TypeDirectory;
   else
     web_file_info.type = WebFileInfo::TypeFile;
+  web_file_info.platformPath =
+    webkit_glue::FilePathToWebString(file_info.path);
   callbacks_->didReadMetadata(web_file_info);
 }
 
 void WebFileSystemCallbackDispatcher::DidReadDirectory(
     const std::vector<base::FileUtilProxy::Entry>& entries, bool has_more) {
   WebVector<WebFileSystemEntry> file_system_entries(entries.size());
   for (size_t i = 0; i < entries.size(); i++) {
     file_system_entries[i].name =
         webkit_glue::FilePathStringToWebString(entries[i].name);
     file_system_entries[i].isDirectory = entries[i].is_directory;
   }
   callbacks_->didReadDirectory(file_system_entries, has_more);
 }
 
 void WebFileSystemCallbackDispatcher::DidOpenFileSystem(
     const std::string& name, const FilePath& root_path) {
   callbacks_->didOpenFileSystem(UTF8ToUTF16(name),
                                 webkit_glue::FilePathToWebString(root_path));
 }
 
 void WebFileSystemCallbackDispatcher::DidFail(
     base::PlatformFileError error_code) {
     callbacks_->didFail(
         webkit_glue::PlatformFileErrorToWebFileError(error_code));
 }
 
 void WebFileSystemCallbackDispatcher::DidWrite(int64 bytes, bool complete) {
   NOTREACHED();
 }