Canvas2d: fix event.region being null on mouseleave/out events

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
index 7b841c4885ff8c1ef35bda30d6a0358afce6109d..d5b5ebd87509307b91ec0ba53ead5768617d9f22 100644
--- a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.cpp
@@ -605,6 +605,16 @@ std::pair<Element*, String> CanvasRenderingContext2D::getControlAndIdIfHitRegion
     return std::make_pair(nullptr, String());
 }
 
+String CanvasRenderingContext2D::getIdFromControl(const Element* element)
+{
+    if (hitRegionsCount() <= 0)
+        return String();
+
+    if (HitRegion* hitRegion = m_hitRegionManager->getHitRegionByControl(const_cast<Element*>(element)))

[dtapuska, 2016/04/08 15:18:31]

ugh this const_cast is ugly. Why does the hit region manager need a non-const
Element* does it mutate the object?

+        return hitRegion->id();
+    return String();
+}
+
 String CanvasRenderingContext2D::textAlign() const
 {
     return textAlignName(state().getTextAlign());