aura: Populate and use the newly added acceleration ratio fields in wheel-events.

content/browser/renderer_host/overscroll_controller.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/browser/renderer_host/overscroll_controller.h"
 
 #include "content/browser/renderer_host/gesture_event_filter.h"
 #include "content/browser/renderer_host/overscroll_controller_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/public/browser/overscroll_configuration.h"
@@ skipping 153 matching lines @@
       return !WebKit::WebInputEvent::isTouchEventType(event.type);
   }
 }
 
 void OverscrollController::ProcessEventForOverscroll(
     const WebKit::WebInputEvent& event) {
   switch (event.type) {
     case WebKit::WebInputEvent::MouseWheel: {
       const WebKit::WebMouseWheelEvent& wheel =
           static_cast<const WebKit::WebMouseWheelEvent&>(event);
-      if (wheel.hasPreciseScrollingDeltas)
-        ProcessOverscroll(wheel.deltaX, wheel.deltaY);
+      if (wheel.hasPreciseScrollingDeltas) {
+        ProcessOverscroll(wheel.deltaX / wheel.accelerationRatioX,

[rjkroege, 2013/02/13 22:08:04]

nit: inverse ratios (i.e. multiplies are cheaper)

+                          wheel.deltaY / wheel.accelerationRatioY);
+      }
       break;
     }
     case WebKit::WebInputEvent::GestureScrollUpdate: {
       const WebKit::WebGestureEvent& gesture =
           static_cast<const WebKit::WebGestureEvent&>(event);
       ProcessOverscroll(gesture.data.scrollUpdate.deltaX,
                         gesture.data.scrollUpdate.deltaY);
       break;
     }
     case WebKit::WebInputEvent::GestureFlingStart: {
@@ skipping 99 matching lines @@
     const WebKit::WebInputEvent& event) const {
   if (!WebKit::WebInputEvent::isGestureEventType(event.type))
     return false;
 
   // If the GestureEventFilter already processed this event, then the event must
   // not be sent to the filter again.
   return !render_widget_host_->gesture_event_filter()->HasQueuedGestureEvents();
 }
 
 }  // namespace content