IDL: Improve "includes for type" mechanism in various ways

Source/bindings/tests/results/core/V8TestInterface.cpp

 // 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_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #if ENABLE(CONDITION)
 #include "V8TestInterface.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/PrivateScriptRunner.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "bindings/core/v8/V8AbstractEventListener.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
-#include "bindings/core/v8/V8Document.h"
 #include "bindings/core/v8/V8EventListenerList.h"
 #include "bindings/core/v8/V8Iterator.h"
 #include "bindings/core/v8/V8Node.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
 #include "bindings/core/v8/V8TestInterface.h"
 #include "bindings/core/v8/V8TestInterface2.h"
 #include "bindings/core/v8/V8TestInterfaceEmpty.h"
 #include "bindings/core/v8/V8Window.h"
 #include "bindings/tests/idls/core/TestImplements2.h"
 #include "bindings/tests/idls/core/TestImplements3Implementation.h"
@@ skipping 2545 matching lines @@
 void V8TestInterface::registerPartial2VoidMethodMethodForPartialInterface(void (*method)(const v8::FunctionCallbackInfo<v8::Value>&))
 {
     TestInterfaceImplementationV8Internal::partial2VoidMethodMethodForPartialInterface = method;
 }
 void V8TestInterface::registerPartial2StaticVoidMethodMethodForPartialInterface(void (*method)(const v8::FunctionCallbackInfo<v8::Value>&))
 {
     TestInterfaceImplementationV8Internal::partial2StaticVoidMethodMethodForPartialInterface = method;
 }
 } // namespace blink
 #endif // ENABLE(CONDITION)