Temporary fix for fast/events/touch/gesture/pad-gesture-fling.html crash.

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 614 matching lines @@
     // Special handling for slow-path fling gestures.
     switch (event.type) {
     case WebInputEvent::GestureFlingStart: {
         if (mainFrameImpl()->frame()->eventHandler().isScrollbarHandlingGestures())
             break;
         m_client->cancelScheduledContentIntents();
         m_positionOnFlingStart = WebPoint(event.x / pageScaleFactor(), event.y / pageScaleFactor());
         m_globalPositionOnFlingStart = WebPoint(event.globalX, event.globalY);
         m_flingModifier = event.modifiers;
         m_flingSourceDevice = event.sourceDevice;
-        OwnPtr<WebGestureCurve> flingCurve = adoptPtr(Platform::current()->createFlingAnimationCurve(event.sourceDevice, WebFloatPoint(event.data.flingStart.velocityX, event.data.flingStart.velocityY), WebSize()));
+        OwnPtr<WebGestureCurve> flingCurve = adoptPtr(Platform::current()->createFlingAnimationCurve(static_cast<WebGestureDevice>(event.sourceDevice), WebFloatPoint(event.data.flingStart.velocityX, event.data.flingStart.velocityY), WebSize()));
+        ASSERT(flingCurve);
         m_gestureAnimation = WebActiveGestureAnimation::createAtAnimationStart(flingCurve.release(), this);
         scheduleAnimation();
         eventSwallowed = true;
 
         m_client->didHandleGestureEvent(event, eventCancelled);
         return eventSwallowed;
     }
     case WebInputEvent::GestureFlingCancel:
         if (endActiveFlingAnimation())
             eventSwallowed = true;
@@ skipping 126 matching lines @@
     return eventSwallowed;
 }
 
 void WebViewImpl::transferActiveWheelFlingAnimation(const WebActiveWheelFlingParameters& parameters)
 {
     TRACE_EVENT0("webkit", "WebViewImpl::transferActiveWheelFlingAnimation");
     ASSERT(!m_gestureAnimation);
     m_positionOnFlingStart = parameters.point;
     m_globalPositionOnFlingStart = parameters.globalPoint;
     m_flingModifier = parameters.modifiers;
-    OwnPtr<WebGestureCurve> curve = adoptPtr(Platform::current()->createFlingAnimationCurve(parameters.sourceDevice, WebFloatPoint(parameters.delta), parameters.cumulativeScroll));
+    OwnPtr<WebGestureCurve> curve = adoptPtr(Platform::current()->createFlingAnimationCurve(static_cast<WebGestureDevice>(parameters.sourceDevice), WebFloatPoint(parameters.delta), parameters.cumulativeScroll));
+    ASSERT(curve);
     m_gestureAnimation = WebActiveGestureAnimation::createWithTimeOffset(curve.release(), this, parameters.startTime);
     scheduleAnimation();
 }
 
 bool WebViewImpl::endActiveFlingAnimation()
 {
     if (m_gestureAnimation) {
         m_gestureAnimation.clear();
         if (m_layerTreeView)
             m_layerTreeView->didStopFlinging();
@@ skipping 3256 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink