Telemtry: hooks "chrome.gpuBenchmarking.smoothScrollBy" with java on android.

content/browser/renderer_host/smooth_scroll_gesture_android.h

+// Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_SMOOTH_GESTURE_ANDROID_H_
+#define CONTENT_BROWSER_RENDERER_HOST_SMOOTH_GESTURE_ANDROID_H_
+
+#include "base/android/jni_android.h"
+#include "base/time.h"
+#include "content/port/browser/smooth_scroll_gesture.h"
+
+namespace content {
+
+class ContentViewCore;
+class RenderWidgetHost;
+
+class SmoothScrollGestureAndroid : public SmoothScrollGesture {
+ public:
+  SmoothScrollGestureAndroid(
+      int pixels_to_scroll,
+      RenderWidgetHost* rwh,
+      base::android::ScopedJavaLocalRef<jobject> java_scroller);
+
+  // Called by the java side once the TimeAnimator ticks.
+  double Tick(JNIEnv* env, jobject obj);
+  bool HasFinished(JNIEnv* env, jobject obj);
+
+  // SmoothScrollGesture
+  virtual bool ForwardInputEvents(base::TimeTicks now,
+                                  RenderWidgetHost* host) OVERRIDE;
+
+ private:
+  virtual ~SmoothScrollGestureAndroid();
+
+  int pixels_scrolled_;
+  bool has_started_;
+
+  int pixels_to_scroll_;
+  RenderWidgetHost* rwh_;
+  base::android::ScopedJavaGlobalRef<jobject> java_scroller_;
+
+  DISALLOW_COPY_AND_ASSIGN(SmoothScrollGestureAndroid);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_SMOOTH_GESTURE_ANDROID_H_