Move Singleton and related structs to namespace base

chrome/browser/devtools/device/devtools_android_bridge.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_DEVTOOLS_DEVICE_DEVTOOLS_ANDROID_BRIDGE_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVICE_DEVTOOLS_ANDROID_BRIDGE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/cancelable_callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/devtools/device/android_device_manager.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/devtools_agent_host.h"
 #include "ui/gfx/geometry/size.h"
 
+namespace base {
 template<typename T> struct DefaultSingletonTraits;
 
-namespace base {
 class MessageLoop;
 class DictionaryValue;
 class ListValue;
 class Thread;
-}
+}  // namespace base
 
 namespace content {
 class BrowserContext;
 }
 
 class DevToolsTargetImpl;
 class PortForwardingController;
 class Profile;
 class WebRTCDeviceProvider;
 class SigninManagerBase;
 class ProfileOAuth2TokenService;
 
 class DevToolsAndroidBridge : public KeyedService {
  public:
   class Factory : public BrowserContextKeyedServiceFactory {
    public:
     // Returns singleton instance of DevToolsAndroidBridge.
     static Factory* GetInstance();
 
     // Returns DevToolsAndroidBridge associated with |profile|.
     static DevToolsAndroidBridge* GetForProfile(Profile* profile);
 
    private:
-    friend struct DefaultSingletonTraits<Factory>;
+    friend struct base::DefaultSingletonTraits<Factory>;
 
     Factory();
     ~Factory() override;
 
     // BrowserContextKeyedServiceFactory overrides:
     KeyedService* BuildServiceInstanceFor(
         content::BrowserContext* context) const override;
     DISALLOW_COPY_AND_ASSIGN(Factory);
   };
 
@@ skipping 233 matching lines @@
   scoped_ptr<PortForwardingController> port_forwarding_controller_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   base::WeakPtrFactory<DevToolsAndroidBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsAndroidBridge);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVICE_DEVTOOLS_ANDROID_BRIDGE_H_