Hide BrowsingInstance from all but SiteInstance, as intended by design.

content/browser/debugger/devtools_manager_impl.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 "content/browser/debugger/devtools_manager_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
-#include "content/browser/browsing_instance.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/debugger/devtools_netlog_observer.h"
 #include "content/browser/debugger/render_view_devtools_agent_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_client_host.h"
 #include "content/public/browser/devtools_agent_host_registry.h"
 #include "googleurl/src/gurl.h"
 
@@ skipping 264 matching lines @@
        it != agent_to_client_host_.end(); ++it) {
     agents.push_back(it->first);
   }
   for (std::vector<DevToolsAgentHost*>::iterator it = agents.begin();
        it != agents.end(); ++it) {
     UnregisterDevToolsClientHostFor(*it);
   }
 }
 
 }  // namespace content