Add abstractions that let embedders drive tests of WebContents.

chrome/browser/ui/cocoa/tab_contents/sad_tab_controller_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.
 
 #include "base/debug/debugger.h"
 #include "base/memory/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/hyperlink_text_view.h"
 #import "chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h"
 #import "chrome/browser/ui/cocoa/tab_contents/sad_tab_view.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/browser/tab_contents/test_tab_contents.h"
 
 @interface SadTabView (ExposedForTesting)
 // Implementation is below.
 - (HyperlinkTextView*)helpTextView;
 @end
 
 @implementation SadTabView (ExposedForTesting)
 - (HyperlinkTextView*)helpTextView {
   return help_.get();
 }
@@ skipping 81 matching lines @@
 // Add handler for the openLearnMoreAboutCrashLink: action to NSApp for testing
 // purposes. Normally this would be sent up the responder tree correctly, but
 // since tests run in the background, key window and main window are never set
 // on NSApplication. Adding it to NSApplication directly removes the need for
 // worrying about what the current window with focus is.
 - (void)openLearnMoreAboutCrashLink:(id)sender {
   SadTabControllerTest::link_clicked_ = true;
 }
 
 @end