Relands: Telemetry: hooks "chrome.gpuBenchmarking.smoothScrollBy" with java on android.

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index 6f2acf1e43dc5c006616d45e1ee1b179d36becf9..f666c143622138af704db0c2293629ca4a0bacd1 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -7,6 +7,7 @@
 
 #include <vector>
 
+#include "base/android/jni_android.h"
 #include "base/android/jni_helper.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -269,6 +270,11 @@ class ContentViewCoreImpl : public ContentViewCore,
   void ShowDisambiguationPopup(
       const gfx::Rect& target_rect, const SkBitmap& zoomed_bitmap);
 
+  // Creates a java-side smooth scroller. Used by
+  // chrome.gpuBenchmarking.smoothScrollBy.
+  base::android::ScopedJavaLocalRef<jobject> CreateSmoothScroller(
+      bool scroll_down, int mouse_event_x, int mouse_event_y);
+
   // Notifies the java object about the external surface, requesting for one if
   // necessary.
   void NotifyExternalSurface(