Add UMA stats for which icon types are shown and clicked on the NTP.

chrome/browser/android/most_visited_sites.h

 // Copyright 2013 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_MOST_VISITED_SITES_H_
 #define CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_
 
 #include <jni.h>
 
 #include <string>
@@ skipping 20 matching lines @@
 
 class PopularSites;
 class Profile;
 
 // Provides the list of most visited sites and their thumbnails to Java.
 class MostVisitedSites : public sync_driver::SyncServiceObserver,
                          public history::TopSitesObserver {
  public:
   explicit MostVisitedSites(Profile* profile);
   void Destroy(JNIEnv* env, jobject obj);
-  void OnLoadingComplete(JNIEnv* env, jobject obj);
   void SetMostVisitedURLsObserver(JNIEnv* env,
                                   jobject obj,
                                   jobject j_observer,
                                   jint num_sites);
   void GetURLThumbnail(JNIEnv* env,
                        jobject obj,
                        jstring url,
                        jobject j_callback);
 
   void BlacklistUrl(JNIEnv* env, jobject obj, jstring j_url);
-  void RecordOpenedMostVisitedItem(JNIEnv* env, jobject obj, jint index);
+  void RecordTileTypeMetrics(JNIEnv* env,
+                             jobject obj,
+                             jintArray jtile_types,
+                             jboolean is_icon_mode);
+  void RecordOpenedMostVisitedItem(JNIEnv* env,
+                                   jobject obj,
+                                   jint index,
+                                   jint tile_type);
 
   // sync_driver::SyncServiceObserver implementation.
   void OnStateChanged() override;
 
   // Registers JNI methods.
   static bool Register(JNIEnv* env);
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
  private:
@@ skipping 125 matching lines @@
   bool received_most_visited_sites_;
 
   // Whether we have received the set of popular sites. Immediately set to true
   // if popular sites are disabled.
   bool received_popular_sites_;
 
   // Whether we have recorded one-shot UMA metrics such as impressions. They are
   // recorded once both the previous flags are true.
   bool recorded_uma_;
 
-  // Counters for UMA metrics.
-
-  // Number of tiles using a local thumbnail image for this NTP session.
-  int num_local_thumbs_;
-  // Number of tiles for which a server thumbnail is provided.
-  int num_server_thumbs_;
-  // Number of tiles for which no thumbnail is found/specified.
-  // In this case a gray tile is used as the main tile.
-  int num_empty_thumbs_;
-
   ScopedObserver<history::TopSites, history::TopSitesObserver> scoped_observer_;
 
   MostVisitedSource mv_source_;
 
   scoped_ptr<PopularSites> popular_sites_;
 
   ScopedVector<Suggestion> current_suggestions_;
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<MostVisitedSites> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MostVisitedSites);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_MOST_VISITED_SITES_H_