Get rid of extensions dependency from content\browser.

chrome/browser/ui/tab_contents/test_tab_contents_wrapper.cc

 // Copyright (c) 2011 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/testing_profile.h"
 #include "content/browser/tab_contents/test_tab_contents.h"
 
 TabContentsWrapperTestHarness::TabContentsWrapperTestHarness()
     : RenderViewHostTestHarness() {
 }
 
 TabContentsWrapperTestHarness::~TabContentsWrapperTestHarness() {
 }
 
 TestTabContents* TabContentsWrapperTestHarness::contents() {
   return static_cast<TestTabContents*>(contents_wrapper_.get()->tab_contents());
 }
 
 TabContentsWrapper* TabContentsWrapperTestHarness::contents_wrapper() {
   return contents_wrapper_.get();
 }
 
 void TabContentsWrapperTestHarness::SetUp() {
-  content::GetContentClient()->set_browser(&browser_client_);
   contents_wrapper_.reset(new TabContentsWrapper(CreateTestTabContents()));
 }
 
 void TabContentsWrapperTestHarness::TearDown() {
   contents_wrapper_.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();
 }