Add abstractions that let embedders drive tests of WebContents.

chrome/browser/ui/content_settings/content_setting_image_model_unittest.cc

 // 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.
 
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/content_settings/content_setting_image_model.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/tab_contents/test_tab_contents_wrapper.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/browser/tab_contents/test_tab_contents.h"
 #include "content/test/test_browser_thread.h"
 #include "content/test/test_renderer_host.h"
 #include "net/cookies/cookie_options.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 class ContentSettingImageModelTest : public TabContentsWrapperTestHarness {
  public:
   ContentSettingImageModelTest()
@@ skipping 37 matching lines @@
   EXPECT_TRUE(content_setting_image_model->get_tooltip().empty());
 
   net::CookieOptions options;
   content_settings->OnCookieChanged(
       GURL("http://google.com"), "A=B", options, false);
   content_setting_image_model->UpdateFromWebContents(contents());
   EXPECT_TRUE(content_setting_image_model->is_visible());
   EXPECT_NE(0, content_setting_image_model->get_icon());
   EXPECT_FALSE(content_setting_image_model->get_tooltip().empty());
 }