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

chrome/browser/chromeos/gdata/gdata_file_system_proxy.h

Index: chrome/browser/chromeos/gdata/gdata_file_system_proxy.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.h b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.h
index d350bdaeb028a0b10a1cf3575b8f7aae75afd4d4..0fa0ecfaab99dd21030dd63fb35b2f9280b8e5dc 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.h
@@ -9,23 +9,19 @@
 #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.