DevTools: generate string16-based handlers for v8_inspector.

third_party/WebKit/Source/platform/inspector_protocol/TypeBuilder_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/PlatformExport.h"
 #include "platform/inspector_protocol/Array.h"
 #include "platform/inspector_protocol/ErrorSupport.h"
 #include "platform/inspector_protocol/Maybe.h"
+#include "platform/inspector_protocol/String16.h"
 #include "platform/inspector_protocol/Values.h"
 #include "platform/inspector_protocol/ValueConversions.h"
 #include "wtf/Assertions.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/text/StringBuilder.h"
-#include "wtf/text/WTFString.h"
 
 namespace blink {
 namespace protocol {
 
+using ErrorString = String16;
+
 class PLATFORM_EXPORT Object {
 public:
     static PassOwnPtr<Object> parse(protocol::Value* value, ErrorSupport* errors);
     ~Object();
 
     PassOwnPtr<protocol::DictionaryValue> serialize() const;
     PassOwnPtr<Object> clone() const;
 private:
     Object(PassOwnPtr<protocol::DictionaryValue> object);
     OwnPtr<protocol::DictionaryValue> m_object;
@@ skipping 164 matching lines @@
 };
 
   {% endfor %}
 
 } // {{domain.domain}}
 {% endfor %}
 
 } // namespace protocol
 } // namespace blink
 
+using blink::protocol::ErrorString;
+
 #endif // !defined({{class_name}}_h)