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

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index c6991308572065f082609ad5d3cba55c25ce5996..35f4ff1276d8208bd1f0484e3949971161ea1efd 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -17,6 +17,7 @@
 #include "content/browser/renderer_host/compositor_impl_android.h"
 #include "content/browser/renderer_host/image_transport_factory_android.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/smooth_scroll_gesture_android.h"
 #include "content/browser/renderer_host/surface_texture_transport_client_android.h"
 #include "content/common/android/device_info.h"
 #include "content/common/gpu/client/gl_helper.h"
@@ -383,6 +384,16 @@ void RenderWidgetHostViewAndroid::ShowDisambiguationPopup(
   content_view_core_->ShowDisambiguationPopup(target_rect, zoomed_bitmap);
 }
 
+SmoothScrollGesture* RenderWidgetHostViewAndroid::CreateSmoothScrollGesture(
+    bool scroll_down, int pixels_to_scroll, int mouse_event_x,
+    int mouse_event_y) {
+  return new SmoothScrollGestureAndroid(
+      pixels_to_scroll,
+      GetRenderWidgetHost(),
+      content_view_core_->CreateSmoothScroller(
+          scroll_down, mouse_event_x, mouse_event_y));
+}
+
 void RenderWidgetHostViewAndroid::OnAcceleratedCompositingStateChange() {
 }