Showing Gloweffect correctly during fling on mainthread.

content/renderer/render_widget.cc

 // 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.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 2210 matching lines @@
     const blink::WebFloatSize& accumulatedRootOverScroll,
     const blink::WebFloatPoint& position,
     const blink::WebFloatSize& velocity) {
   DidOverscrollParams params;
   // TODO(jdduke): Consider bundling the overscroll with the input event ack to
   // save an IPC.
   params.accumulated_overscroll = gfx::Vector2dF(
       accumulatedRootOverScroll.width, accumulatedRootOverScroll.height);
   params.latest_overscroll_delta =
       gfx::Vector2dF(unusedDelta.width, unusedDelta.height);
+  // TODO(sataya.m): ratify velocity once http://crbug.com/499743 is fixed.

[jdduke (slow), 2015/06/12 15:57:38]

Nit: "Ratify", thought it's not quite clear what ratify means in this context
=/.

   params.current_fling_velocity =
-      gfx::Vector2dF(velocity.width, velocity.height);
+      gfx::Vector2dF(-velocity.width, -velocity.height);
   params.causal_event_viewport_point = gfx::PointF(position.x, position.y);
   Send(new InputHostMsg_DidOverscroll(routing_id_, params));
 }
 
 void RenderWidget::StartCompositor() {
   // For widgets that are never visible, we don't need the compositor to run
   // at all.
   if (never_visible_)
     return;
   // In tests without a RenderThreadImpl, don't set ready as this kicks
@@ skipping 211 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content