Try to cut down Browser/TabContents header dependencies.

chrome/browser/renderer_host/test/test_render_view_host.cc

 // Copyright (c) 2010 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/renderer_host/test/test_render_view_host.h"
 
 #include "chrome/browser/browser_url_handler.h"
 #include "chrome/browser/renderer_host/test/test_backing_store.h"
 #include "chrome/browser/tab_contents/test_tab_contents.h"
 #include "chrome/common/dom_storage_common.h"
 #include "chrome/common/render_messages.h"
 #include "gfx/rect.h"
+#include "webkit/glue/webpreferences.h"
 
 using webkit_glue::PasswordForm;
 
 TestRenderViewHost::TestRenderViewHost(SiteInstance* instance,
                                        RenderViewHostDelegate* delegate,
                                        int routing_id)
     : RenderViewHost(instance, delegate, routing_id,
                      kInvalidSessionStorageNamespaceId),
       render_view_created_(false),
       delete_counter_(NULL) {
@@ skipping 144 matching lines @@
   contents_.reset();
 
   // Make sure that we flush any messages related to TabContents destruction
   // before we destroy the profile.
   MessageLoop::current()->RunAllPending();
 
   // Release the profile on the UI thread.
   message_loop_.DeleteSoon(FROM_HERE, profile_.release());
   message_loop_.RunAllPending();
 }