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

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index c306fb956336192ff2b5e90fb37cbd5954ae317e..160bce5b66ed50606010e5f04cdb28fdc4f24861 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -632,7 +632,8 @@ bool WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
         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;
@@ -779,7 +780,8 @@ void WebViewImpl::transferActiveWheelFlingAnimation(const WebActiveWheelFlingPar
     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();
 }