Implement gin::ObjectTemplateBuilder

gin/converter.h

 // Copyright 2013 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 GIN_CONVERTER_H_
 #define GIN_CONVERTER_H_
 
 #include <string>
 #include <vector>
 
+#include "base/strings/string_piece.h"
 #include "v8/include/v8.h"
 
 namespace gin {
 
 template<typename T>
 struct Converter {};
 
 template<>
 struct Converter<bool> {
   static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
@@ skipping 44 matching lines @@
 template<>
 struct Converter<double> {
   static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
                                     double val);
   static bool FromV8(v8::Isolate* isolate,
                      v8::Handle<v8::Value> val,
                      double* out);
 };
 
 template<>
+struct Converter<base::StringPiece> {
+  static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
+                                    const base::StringPiece& val);
+  // No conversion out is possible because StringPiece does not contain storage.
+};
+
+template<>
 struct Converter<std::string> {
   static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
                                     const std::string& val);
   static bool FromV8(v8::Isolate* isolate,
                      v8::Handle<v8::Value> val,
                      std::string* out);
 };
 
 template<>
 struct Converter<v8::Handle<v8::Function> > {
@@ skipping 71 matching lines @@
 };
 
 // Convenience functions that deduce T.
 template<typename T>
 v8::Handle<v8::Value> ConvertToV8(v8::Isolate* isolate,
                                   T input) {
   return Converter<T>::ToV8(isolate, input);
 }
 
 inline v8::Handle<v8::String> StringToV8(v8::Isolate* isolate,
-                                         std::string input) {
+                                         const base::StringPiece& input) {
   return ConvertToV8(isolate, input).As<v8::String>();
 }
 
 v8::Handle<v8::String> StringToSymbol(v8::Isolate* isolate,
-                                      const std::string& val);
+                                      const base::StringPiece& val);
 
 template<typename T>
 bool ConvertFromV8(v8::Isolate* isolate, v8::Handle<v8::Value> input,
                    T* result) {
   return Converter<T>::FromV8(isolate, input, result);
 }
 
 std::string V8ToString(v8::Handle<v8::Value> value);
 
 }  // namespace gin
 
 #endif  // GIN_CONVERTER_H_