[DevTools] Reduce API surface of String16.

third_party/WebKit/Source/platform/inspector_protocol/ValueConversions.h

 // Copyright 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 ValueConversions_h
 #define ValueConversions_h
 
 #include "platform/inspector_protocol/ErrorSupport.h"
 #include "platform/inspector_protocol/Platform.h"
 #include "platform/inspector_protocol/String16.h"
@@ skipping 65 matching lines @@
         return result;
     }
 
     static std::unique_ptr<protocol::Value> serialize(double value)
     {
         return FundamentalValue::create(value);
     }
 };
 
 template<>
-struct ValueConversions<String> {
-    static String parse(protocol::Value* value, ErrorSupport* errors)
+struct ValueConversions<InspectorProtocolConvenienceStringType> {
+    static InspectorProtocolConvenienceStringType parse(protocol::Value* value, ErrorSupport* errors)
     {
         String16 result;
         bool success = value ? value->asString(&result) : false;
         if (!success)
             errors->addError("string value expected");
         return result;
     }
 
-    static std::unique_ptr<protocol::Value> serialize(const String& value)
+    static std::unique_ptr<protocol::Value> serialize(const InspectorProtocolConvenienceStringType& value)
     {
         return StringValue::create(value);
     }
 };
 
 template<>
 struct ValueConversions<String16> {
     static String16 parse(protocol::Value* value, ErrorSupport* errors)
     {
         String16 result;
@@ skipping 71 matching lines @@
     static std::unique_ptr<protocol::Value> serialize(const std::unique_ptr<ListValue>& value)
     {
         return value->clone();
     }
 };
 
 } // namespace platform
 } // namespace blink
 
 #endif // !defined(ValueConversions_h)