Cleanup of removing unnecessary web_contents.h include from webview.h. This is split off from https…

ash/screensaver/screensaver_view_unittest.cc

 // 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 "ash/screensaver/screensaver_view.h"
 
 #include "ash/test/ash_test_base.h"
 #include "base/bind.h"
 #include "content/public/browser/browser_context.h"
+#include "content/public/browser/web_contents.h"
 #include "ui/views/controls/webview/webview.h"
 #include "ui/views/test/webview_test_helper.h"
 
 namespace ash {
 namespace test {
 
 class ScreensaverViewTest : public ash::test::AshTestBase {
  public:
   ScreensaverViewTest() {
     url_ = GURL("http://www.google.com");
@@ skipping 59 matching lines @@
   RunAllPendingInMessageLoop();
 
   ash::CloseScreensaver();
   ExpectClosedScreensaver();
   ash::CloseScreensaver();
   ExpectClosedScreensaver();
 }
 
 }  // namespace test
 }  // namespace ash