First fix to minimize copying of image data.

chrome/browser/sync/sync_setup_wizard.cc

 // Copyright (c) 2006-2008 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.
 
 #ifdef CHROME_PERSONALIZATION
 
 #include "chrome/browser/sync/sync_setup_wizard.h"
 
 #include "app/resource_bundle.h"
 #include "base/message_loop.h"
@@ skipping 24 matching lines @@
       return "text/html";
   }
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncResourcesSource);
 };
 
 void SyncResourcesSource::StartDataRequest(const std::string& path_raw,
                                            int request_id) {
   scoped_refptr<RefCountedBytes> html_bytes(new RefCountedBytes);
   if (path_raw == chrome::kSyncThrobberPath) {
-    ResourceBundle::GetSharedInstance().LoadImageResourceBytes(IDR_THROBBER,
-        &html_bytes->data);
-    SendResponse(request_id, html_bytes);
+    scoped_refptr<RefCountedMemory> throbber(
+        ResourceBundle::GetSharedInstance().LoadImageResourceBytes(
+            IDR_THROBBER));
+    SendResponse(request_id, throbber);
     return;
   }
 
   std::string response;
   if (path_raw == chrome::kSyncGaiaLoginPath) {
     DictionaryValue localized_strings;
     localized_strings.SetString(L"settingupsync",
         l10n_util::GetString(IDS_SYNC_LOGIN_SETTING_UP_SYNC));
     localized_strings.SetString(L"introduction",
         l10n_util::GetString(IDS_SYNC_LOGIN_INTRODUCTION));
@@ skipping 132 matching lines @@
 // static
 SyncSetupWizard::State SyncSetupWizard::GetEndStateForDiscreteRun(
     State start_state) {
   State result = start_state == GAIA_LOGIN ? GAIA_SUCCESS : DONE;
   DCHECK_NE(DONE, result) <<
       "Invalid start state for discrete run: " << start_state;
   return result;
 }
 
 #endif  // CHROME_PERSONALIZATION