Add abstractions that let embedders drive tests of WebContents.

chrome/browser/ui/cocoa/content_settings/collected_cookies_mac_unittest.mm

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/profiles/profile.h"
 #import "chrome/browser/ui/cocoa/content_settings/collected_cookies_mac.h"
 #include "chrome/browser/ui/tab_contents/test_tab_contents_wrapper.h"
-#include "content/browser/tab_contents/test_tab_contents.h"
 #include "content/test/test_browser_thread.h"
 #include "chrome/test/base/testing_profile.h"
 
 using content::BrowserThread;
 
 namespace {
 
 class CollectedCookiesWindowControllerTest
     : public TabContentsWrapperTestHarness {
  public:
   CollectedCookiesWindowControllerTest()
       : ui_thread_(BrowserThread::UI, MessageLoopForUI::current()) {
   }
 
  private:
   content::TestBrowserThread ui_thread_;
 };
 
 TEST_F(CollectedCookiesWindowControllerTest, Construction) {
   CollectedCookiesWindowController* controller =
       [[CollectedCookiesWindowController alloc]
           initWithTabContentsWrapper:contents_wrapper()];
 
   [controller release];
 }
 
 }  // namespace