Cache function templates in PluginObject to avoid memory leak.

content/renderer/pepper/plugin_object.h

 // Copyright (c) 2010 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 CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
 #define CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "gin/interceptor.h"
 #include "gin/wrappable.h"
 #include "ppapi/c/pp_var.h"
+#include "v8/include/v8-util.h"
 
 struct PPP_Class_Deprecated;
 
 namespace gin {
   class Arguments;
 }  // namespace gin
 
 namespace content {
 
 class PepperPluginInstanceImpl;
@@ skipping 43 matching lines @@
   // gin::Wrappable
   gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 
   // Helper method to get named properties.
   v8::Local<v8::Value> GetPropertyOrMethod(v8::Isolate* isolate,
                                            PP_Var identifier_var);
 
   void Call(const std::string& identifier, gin::Arguments* args);
 
+  v8::Local<v8::FunctionTemplate> GetFunctionTemplate(v8::Isolate* isolate,
+                                                      const std::string& name);
+
   PepperPluginInstanceImpl* instance_;
 
   const PPP_Class_Deprecated* ppp_class_;
   void* ppp_class_data_;
 
   base::WeakPtrFactory<PluginObject> weak_factory_;
 
+  v8::StdPersistentValueMap<std::string, v8::FunctionTemplate> template_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(PluginObject);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PLUGIN_OBJECT_H_