Split UserMetrics into API vs. implementation. Move API to content/public.

chrome/browser/extensions/extension_service.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/extensions/extension_service.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 74 matching lines @@
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/plugin_process_host.h"
 #include "content/browser/plugin_service.h"
-#include "content/browser/user_metrics.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_agent_host_registry.h"
 #include "content/public/browser/devtools_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/pepper_plugin_info.h"
 #include "googleurl/src/gurl.h"
 #include "grit/theme_resources.h"
 #include "net/base/registry_controlled_domain.h"
@@ skipping 2450 matching lines @@
   //
   // To coexist with certain unit tests that don't have an IO thread message
   // loop available at ExtensionService shutdown, we lazy-initialize this
   // object so that those cases neither create nor destroy a SocketController.
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   if (!socket_controller_) {
     socket_controller_ = new extensions::SocketController();
   }
   return socket_controller_;
 }