Add abstractions that let embedders drive tests of WebContents.

chrome/test/base/chrome_render_view_host_test_harness.h

 // 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.
 
 #ifndef CHROME_TEST_BASE_CHROME_RENDER_VIEW_HOST_TEST_HARNESS_H_
 #define CHROME_TEST_BASE_CHROME_RENDER_VIEW_HOST_TEST_HARNESS_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "content/test/test_renderer_host.h"
 
 class TestingProfile;
 
+namespace content {
+class WebContents;
+}
+
 // Wrapper around RenderViewHostTestHarness that uses a TestingProfile as
 // browser context instead of a TestBrowserContext.
 class ChromeRenderViewHostTestHarness : public RenderViewHostTestHarness {
  public:
   ChromeRenderViewHostTestHarness();
   virtual ~ChromeRenderViewHostTestHarness();
 
   TestingProfile* profile();
 
+  content::WebContents* contents();
   content::RenderViewHostTester* rvh_tester();
 
  protected:
   // testing::Test
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 };
 
 #endif  // CHROME_TEST_BASE_CHROME_RENDER_VIEW_HOST_TEST_HARNESS_H_