Add abstractions that let embedders drive tests of WebContents.

chrome/browser/ui/tab_contents/test_tab_contents_wrapper.cc

-// 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 "chrome/browser/ui/tab_contents/test_tab_contents_wrapper.h"
 
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/browser/tab_contents/test_tab_contents.h"
+#include "content/public/browser/web_contents.h"
+
+using content::WebContents;
 
 TabContentsWrapperTestHarness::TabContentsWrapperTestHarness()
     : ChromeRenderViewHostTestHarness() {
 }
 
 TabContentsWrapperTestHarness::~TabContentsWrapperTestHarness() {
 }
 
-TestTabContents* TabContentsWrapperTestHarness::contents() {
-  return contents_wrapper_.get() ?
-      static_cast<TestTabContents*>(contents_wrapper_->web_contents()) : NULL;
+WebContents* TabContentsWrapperTestHarness::web_contents() {
+  return contents_wrapper_.get() ? contents_wrapper_->web_contents() : NULL;
 }
 
 TabContentsWrapper* TabContentsWrapperTestHarness::contents_wrapper() {
   return contents_wrapper_.get();
 }
 
-void TabContentsWrapperTestHarness::SetContents(TestTabContents* contents) {
+void TabContentsWrapperTestHarness::SetContents(WebContents* contents) {
   contents_wrapper_.reset(contents ? new TabContentsWrapper(contents) : NULL);
 }
 
 void TabContentsWrapperTestHarness::SetUp() {
   ChromeRenderViewHostTestHarness::SetUp();
-  SetContents(CreateTestTabContents());
+  SetContents(CreateTestWebContents());
 }
 
 void TabContentsWrapperTestHarness::TearDown() {
   contents_wrapper_.reset();
 
   // Make sure that we flush any messages related to TabContents destruction
   // before we destroy the browser context.
   MessageLoop::current()->RunAllPending();
 
   // Release the browser context on the UI thread.
   message_loop_.DeleteSoon(FROM_HERE, browser_context_.release());
   message_loop_.RunAllPending();
 
   ChromeRenderViewHostTestHarness::TearDown();
 }