Move ntp_tiles classes to namespace ntp_tiles.

chrome/browser/android/ntp/most_visited_sites_bridge.h

 // Copyright 2016 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_ANDROID_NTP_MOST_VISITED_SITES_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_NTP_MOST_VISITED_SITES_BRIDGE_H_
 
 #include <jni.h>
 #include <stddef.h>
 
@@ skipping 44 matching lines @@
 
   // Registers JNI methods.
   static bool Register(JNIEnv* env);
 
  private:
   ~MostVisitedSitesBridge();
 
   class JavaObserver;
   std::unique_ptr<JavaObserver> java_observer_;
 
-  class SupervisorBridge : public MostVisitedSitesSupervisor,
+  class SupervisorBridge : public ntp_tiles::MostVisitedSitesSupervisor,
                            public SupervisedUserServiceObserver {
    public:
     explicit SupervisorBridge(Profile* profile);
     ~SupervisorBridge() override;
 
     void SetObserver(Observer* observer) override;
     bool IsBlocked(const GURL& url) override;
     std::vector<MostVisitedSitesSupervisor::Whitelist> whitelists() override;
     bool IsChildProfile() override;
 
     // SupervisedUserServiceObserver implementation.
     void OnURLFilterChanged() override;
 
    private:
     Profile* const profile_;
     Observer* supervisor_observer_;
     ScopedObserver<SupervisedUserService, SupervisedUserServiceObserver>
         register_observer_;
   };
   SupervisorBridge supervisor_;
 
-  MostVisitedSites most_visited_;
+  ntp_tiles::MostVisitedSites most_visited_;
 
   DISALLOW_COPY_AND_ASSIGN(MostVisitedSitesBridge);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_NTP_MOST_VISITED_SITES_BRIDGE_H_