bindings: Retires V8T::toEventTarget and reduces the binary size.

Source/bindings/core/v8/WrapperTypeInfo.cpp

Index: Source/bindings/core/v8/WrapperTypeInfo.cpp
diff --git a/Source/bindings/core/v8/WrapperTypeInfo.cpp b/Source/bindings/core/v8/WrapperTypeInfo.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..48727b6c27f909a242b895e5b2ea49ee15340ba4
--- /dev/null
+++ b/Source/bindings/core/v8/WrapperTypeInfo.cpp
@@ -0,0 +1,19 @@
+// Copyright 2014 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 "config.h"
+#include "bindings/core/v8/WrapperTypeInfo.h"
+
+#include "core/events/EventTarget.h"
+
+namespace blink {
+
+EventTarget* WrapperTypeInfo::toEventTarget(v8::Handle<v8::Object> object) const
+{
+    if (eventTargetInheritance == NotInheritFromEventTarget)
+        return 0;
+    return static_cast<EventTarget*>(blink::toScriptWrappableBase(object));
+}
+
+} // namespace blink