DevTools: consolidate protocol generators for front-end, backend and type builder.

third_party/WebKit/Source/platform/inspector_protocol/Dispatcher_h.template

 // This file is generated
 
 // Copyright (c) 2016 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.
 
 #ifndef {{class_name}}_h
 #define {{class_name}}_h
 
-#include "platform/inspector_protocol/Backend.h"
 #include "platform/inspector_protocol/TypeBuilder.h"
 
 namespace blink {
 namespace protocol {
 
 class FrontendChannel;
 class DispatcherImplWeakPtr;
 
 class PLATFORM_EXPORT Dispatcher {
 public:
@@ skipping 19 matching lines @@
     void reportProtocolError(int callId, CommonErrorCode, const String16& errorMessage) const;
     virtual void reportProtocolError(int callId, CommonErrorCode, const String16& errorMessage, ErrorSupport*) const = 0;
     virtual void dispatch(const String16& message) = 0;
     static bool getCommandName(const String16& message, String16* result);
 };
 
 } // namespace protocol
 } // namespace blink
 
 #endif // !defined({{class_name}}_h)