Reland: Fix slop region boundary handling.

content/browser/renderer_host/ui_events_helper.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/ui_events_helper.h"
 
 #include "content/common/input/web_touch_event_traits.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
@@ skipping 296 matching lines @@
   if (point->state == blink::WebTouchPoint::StateMoved) {
     // It is possible for badly written touch drivers to emit Move events even
     // when the touch location hasn't changed. In such cases, consume the event
     // and pretend nothing happened.
     if (point->position.x == event.x() && point->position.y == event.y())
       return NULL;
   }
   point->position.x = event.x();
   point->position.y = event.y();
 
-  const gfx::Point root_point = event.root_location();
+  const gfx::PointF& root_point = event.root_location_f();
   point->screenPosition.x = root_point.x();
   point->screenPosition.y = root_point.y();
 
   // Mark the rest of the points as stationary.
   for (unsigned i = 0; i < web_event->touchesLength; ++i) {
     blink::WebTouchPoint* iter = web_event->touches + i;
     if (iter != point)
       iter->state = blink::WebTouchPoint::StateStationary;
   }
 
   // Update the type of the touch event.
   WebTouchEventTraits::ResetType(TouchEventTypeFromEvent(event),
                                  event.time_stamp().InSecondsF(),
                                  web_event);
   web_event->modifiers = EventFlagsToWebEventModifiers(event.flags());
 
   return point;
 }
 
 }  // namespace content