Move ExtensionHost into extensions namespace

chrome/browser/extensions/extension_devtools_browsertests.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 "base/memory/ref_counted.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/extensions/extension_devtools_browsertest.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
@@ skipping 13 matching lines @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
 #include "net/base/net_util.h"
 
 using content::DevToolsAgentHost;
 using content::DevToolsAgentHostRegistry;
 using content::DevToolsClientHost;
 using content::DevToolsManager;
 using content::WebContents;
+using extensions::ExtensionHost;
 
 // Looks for an background ExtensionHost whose URL has the given path component
 // (including leading slash).  Also verifies that the expected number of hosts
 // are loaded.
 static ExtensionHost* FindBackgroundHostWithPath(
     ExtensionProcessManager* manager,
     const std::string& path,
     int expected_hosts) {
   ExtensionHost* host = NULL;
   int num_hosts = 0;
@@ skipping 124 matching lines @@
   // Removing the listeners from the second extension should tear the bridge
   // down.
   result = false;
   ASSERT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       host_two->render_view_host(), L"", L"unregisterListeners()", &result));
   EXPECT_TRUE(result);
   ASSERT_FALSE(devtools_manager->GetDevToolsClientHostFor(
       DevToolsAgentHostRegistry::GetDevToolsAgentHost(
           web_contents->GetRenderViewHost())));
 }