gdata cleanup: Fix mismatched comments and remove unnecessary forward declarations.

chrome/browser/chromeos/gdata/gdata_file_system_proxy.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 
 #include "chrome/browser/chromeos/gdata/gdata_errorcode.h"
 #include "chrome/browser/chromeos/gdata/gdata_file_system_interface.h"
 #include "webkit/chromeos/fileapi/remote_file_system_proxy.h"
 
-class Profile;
-
 namespace fileapi {
 class FileSystemURL;
 }
 
 namespace gdata {
 
-class GDataEntry;
 class GDataEntryProto;
 class GDataFileSystemInterface;
 
-// The interface class for remote file system proxy.
+// Implementation of File API's remote file system proxy for GData file system.
 class GDataFileSystemProxy : public fileapi::RemoteFileSystemProxyInterface {
  public:
-  // |profile| is used to create GDataFileSystem, which is a per-profile
-  // instance.
+  // |file_system| is the GDataFileSystem instance owned by GDataSystemService.
   explicit GDataFileSystemProxy(GDataFileSystemInterface* file_system);
 
   // fileapi::RemoteFileSystemProxyInterface overrides.
   virtual void GetFileInfo(
       const fileapi::FileSystemURL& url,
       const fileapi::FileSystemOperationInterface::GetMetadataCallback&
           callback) OVERRIDE;
   virtual void Copy(
       const fileapi::FileSystemURL& src_url,
       const fileapi::FileSystemURL& dest_url,
@@ skipping 146 matching lines @@
   // GDataFileSystemProxy is owned by Profile, which outlives
   // GDataFileSystemProxy, which is owned by CrosMountPointProvider (i.e. by
   // the time Profile is removed, the file manager is already gone). Hence
   // it's safe to use this as a raw pointer.
   GDataFileSystemInterface* file_system_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_