Replace JSON (de)serialization of extension messages with direct Value pickling.

chrome/browser/extensions/api/messaging/native_message_process_host.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_
 
 #include <queue>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/process.h"
 #include "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 #include "content/public/browser/browser_thread.h"
 
+namespace base {
+class ListValue;
+}
+
 namespace net {
-
 class DrainableIOBuffer;
 class FileStream;
 class IOBuffer;
 class IOBufferWithSize;
-
 }  // namespace net
 
 namespace extensions {
 
 // Manages the native side of a connection between an extension and a native
 // process.
 //
 // This class must only be created, called, and deleted on the IO thread.
 // Public methods typically accept callbacks which will be invoked on the UI
 // thread.
 class NativeMessageProcessHost
 #if defined(OS_POSIX)
     : public base::MessageLoopForIO::Watcher
 #endif  // !defined(OS_POSIX)
 {
  public:
   // Interface for the object that receives messages from the native process.
   class Client {
    public:
     virtual ~Client() {}
     // Called on the UI thread.
-    virtual void PostMessageFromNativeProcess(int port_id,
-                                              const std::string& message) = 0;
+    virtual void PostMessageFromNativeProcess(
+        int port_id,
+        scoped_ptr<base::ListValue> message) = 0;
     virtual void CloseChannel(int port_id,
                               const std::string& error_message) = 0;
   };
 
   virtual ~NativeMessageProcessHost();
 
   static scoped_ptr<NativeMessageProcessHost> Create(
       base::WeakPtr<Client> weak_client_ui,
       const std::string& source_extension_id,
       const std::string& native_host_name,
@@ skipping 102 matching lines @@
 
   // Set to true when a write is pending.
   bool write_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeMessageProcessHost);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_MESSAGE_PROCESS_HOST_H_