Add abstractions that let embedders drive tests of WebContents.

chrome/browser/instant/instant_loader.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_BROWSER_INSTANT_INSTANT_LOADER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "base/timer.h"
 #include "chrome/browser/instant/instant_commit_type.h"
 #include "chrome/browser/search_engines/template_url_id.h"
 #include "chrome/common/instant_types.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/rect.h"
 
 class InstantLoaderDelegate;
 class InstantLoaderManagerTest;
-class TabContents;
 class TabContentsWrapper;
 class TemplateURL;
 
 namespace content {
 class SessionStorageNamespace;
 }
 
 // InstantLoader does the loading of a particular URL for InstantController.
 // InstantLoader notifies its delegate, which is typically InstantController, of
 // all interesting events.
@@ skipping 219 matching lines @@
   std::string group_;
 
   // The session storage namespace identifier of the original tab contents that
   // the preview_contents_ was based upon.
   scoped_refptr<content::SessionStorageNamespace> session_storage_namespace_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantLoader);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_