PPAPI: Implement synchronous postMessage

content/renderer/pepper/v8_var_converter.h

 // Copyright (c) 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 CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H
 #define CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 28 matching lines @@
   // graph in the result will have a refcount equal to the number of references
   // to it in the graph. The root of the result will have one additional
   // reference. The callback is run when conversion is complete with the
   // resulting var and a bool indicating success or failure. Conversion is
   // asynchronous because converting some resources may result in communication
   // across IPC. |context| is guaranteed to only be used synchronously.
   void FromV8Value(
       v8::Handle<v8::Value> val,
       v8::Handle<v8::Context> context,
       const base::Callback<void(const ppapi::ScopedPPVar&, bool)>& callback);
+  bool FromV8ValueSync(v8::Handle<v8::Value> val,
+                       v8::Handle<v8::Context> context,
+                       ppapi::ScopedPPVar* result_var);
  private:
   // Returns true on success, false on failure.
   bool FromV8ValueInternal(v8::Handle<v8::Value> val,
                            v8::Handle<v8::Context> context,
                            ppapi::ScopedPPVar* result_var);
 
   // The message loop to run the callback to |FromV8Value| from.
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
 
   // The converter to use for converting V8 vars to resources.
   scoped_ptr<ResourceConverter> resource_converter_;
 
   DISALLOW_COPY_AND_ASSIGN(V8VarConverter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_V8_VAR_CONVERTER_H