NTP tiles: Split C++ and Java MostVisitedSites classes.

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>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/macros.h"
+#include "chrome/browser/android/ntp/most_visited_sites.h"
+
+class Profile;
+
+// Provides the list of most visited sites and their thumbnails to Java.
+class MostVisitedSitesBridge {
+ public:
+  explicit MostVisitedSitesBridge(Profile* profile);
+
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+  void SetMostVisitedURLsObserver(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& j_observer,
+      jint num_sites);
+
+  void GetURLThumbnail(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jstring>& url,
+      const base::android::JavaParamRef<jobject>& j_callback);
+  void AddOrRemoveBlacklistedUrl(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jstring>& j_url,
+      jboolean add_url);
+  void RecordTileTypeMetrics(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jintArray>& jtile_types);
+  void RecordOpenedMostVisitedItem(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      jint index,
+      jint tile_type);
+
+  // Registers JNI methods.
+  static bool Register(JNIEnv* env);
+
+ private:
+  ~MostVisitedSitesBridge();
+
+  class Observer;
+  std::unique_ptr<Observer> observer_;
+
+  MostVisitedSites most_visited_;
+
+  DISALLOW_COPY_AND_ASSIGN(MostVisitedSitesBridge);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_NTP_MOST_VISITED_SITES_BRIDGE_H_