Canvas2d: Implement rerouting event by hit region's control.

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

Index: third_party/WebKit/Source/modules/canvas2d/MouseEventHitRegion.cpp
diff --git a/third_party/WebKit/Source/modules/canvas2d/MouseEventHitRegion.cpp b/third_party/WebKit/Source/modules/canvas2d/MouseEventHitRegion.cpp
deleted file mode 100644
index 71b628416551ee3daad5376353fa6165ad38da7b..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/modules/canvas2d/MouseEventHitRegion.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2015 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 "modules/canvas2d/MouseEventHitRegion.h"
-
-#include "core/events/MouseEvent.h"
-#include "core/html/HTMLCanvasElement.h"
-
-namespace blink {
-
-String MouseEventHitRegion::region(MouseEvent& event)
-{
-    if (!event.target() || !isHTMLCanvasElement(event.target()->toNode()))
-        return String();
-
-    HTMLCanvasElement* canvas = toHTMLCanvasElement(event.target()->toNode());
-    return regionIdFromAbsoluteLocation(*canvas, event.absoluteLocation());
-}
-
-} // namespace blink
-