Prepare ClearBrowsingDataDialogFragment for browsing data counters.

chrome/browser/android/browsing_data/browsing_data_counter_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_BROWSING_DATA_BROWSING_DATA_COUNTER_BRIDGE_H_
+#define CHROME_BROWSER_ANDROID_BROWSING_DATA_BROWSING_DATA_COUNTER_BRIDGE_H_
+
+#include "base/android/jni_weak_ref.h"
+#include "base/android/scoped_java_ref.h"
+#include "chrome/browser/browsing_data/browsing_data_counter.h"
+
+class Profile;
+
+// This class is a wrapper for BrowsingDataCounter (C++ backend) to be used by
+// ClearBrowsingDataFragment (Java UI).
+class BrowsingDataCounterBridge {
+ public:
+  // Creates a BrowsingDataCounterBridge for a certain browsing data type.
+  // The |data_type| is a value of the enum BrowsingDataType.
+  BrowsingDataCounterBridge(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      jint data_type);
+
+  ~BrowsingDataCounterBridge();
+
+  // Called by the Java counterpart when it is getting garbage collected.
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  void onCounterFinished(
+      scoped_ptr<BrowsingDataCounter::Result> result);
+
+  base::android::ScopedJavaGlobalRef<jobject> jobject_;
+  scoped_ptr<BrowsingDataCounter> counter_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowsingDataCounterBridge);
+};
+
+#endif // CHROME_BROWSER_ANDROID_BROWSING_DATA_BROWSING_DATA_COUNTER_BRIDGE_H_