[bindings] Include copyright block in generated code for consistency.

Source/bindings/templates/dictionary_v8.cpp

Index: Source/bindings/templates/dictionary_v8.cpp
diff --git a/Source/bindings/templates/dictionary_v8.cpp b/Source/bindings/templates/dictionary_v8.cpp
index e3bd0fa52beb168787c793731a647ca387b22258..785bcdef03f2cdaeff8df10e4216c6f025286bd8 100644
--- a/Source/bindings/templates/dictionary_v8.cpp
+++ b/Source/bindings/templates/dictionary_v8.cpp
@@ -1,10 +1,5 @@
 {% from 'conversions.cpp' import declare_enum_validation_variable %}
-// 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.
-
-// This file has been auto-generated by {{code_generator}}. DO NOT MODIFY!
-
+{% include 'copyright_block.txt' %}
 #include "config.h"
 #include "{{v8_original_class}}.h"