OverscrollGlow for mainThread-{CHROMIUM CHANGES}

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 2b2dbf58db115e6027dc6d35f5a34418c8917e8c..c851e29605c7bbbc442ec209c7c444d290179ee4 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -2222,6 +2222,22 @@ void RenderWidget::didHandleGestureEvent(
 #endif
 }
 
+void RenderWidget::didOverscroll(
+    const blink::WebFloatSize& unusedDelta,
+    const blink::WebFloatSize& accumulatedRootOverScroll,
+    const blink::WebFloatPoint& position,
+    const blink::WebFloatSize& velocity) {
+  DidOverscrollParams params;

[jdduke (slow), 2015/06/05 14:32:51]

Can you add a

"TODO(jdduke): Consider bundling the overscroll with the input event ack to save
an IPC."

That's what we do with the compositor (see
https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/i...).

[MuVen, 2015/06/08 07:09:58]

Done.

+  params.accumulated_overscroll = gfx::Vector2dF(
+      accumulatedRootOverScroll.width, accumulatedRootOverScroll.height);
+  params.latest_overscroll_delta =
+      gfx::Vector2dF(unusedDelta.width, unusedDelta.height);
+  params.current_fling_velocity =
+      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.