First fix to minimize copying of image data.

chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc

 // Copyright (c) 2009 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 "chrome/browser/browser_theme_provider.h"
 #include "chrome/browser/dom_ui/dom_ui_theme_source.h"
 #include "chrome/browser/profile.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/testing_profile.h"
 #include "grit/theme_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // A mock ThemeSource (so we can override SendResponse to get at its data).
 class MockThemeSource : public DOMUIThemeSource {
  public:
   explicit MockThemeSource(Profile* profile)
       : DOMUIThemeSource(profile),
         result_request_id_(-1),
         result_data_size_(0) {
   }
 
-  virtual void SendResponse(int request_id, RefCountedBytes* data) {
-    result_data_size_ = data ? data->data.size() : 0;
+  virtual void SendResponse(int request_id, RefCountedMemory* data) {
+    result_data_size_ = data ? data->size() : 0;
     result_request_id_ = request_id;
   }
 
   int result_request_id_;
   size_t result_data_size_;
 };
 
 class DOMUISourcesTest : public testing::Test {
  public:
   TestingProfile* profile() const { return profile_.get(); }
@@ skipping 46 matching lines @@
 
   theme_source()->StartDataRequest("css/newtab.css?pie", 3);
   EXPECT_EQ(theme_source()->result_request_id_, 3);
   EXPECT_NE(theme_source()->result_data_size_, empty_size);
 
   // Check that we send NULL back when we can't find what we're looking for.
   theme_source()->StartDataRequest("css/WRONGURL", 7);
   EXPECT_EQ(theme_source()->result_request_id_, 7);
   EXPECT_EQ(theme_source()->result_data_size_, empty_size);
 }