[Android WebView] Implement the capture picture API.

ipc/ipc_channel_proxy.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 IPC_IPC_CHANNEL_PROXY_H_
 #define IPC_IPC_CHANNEL_PROXY_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 219 matching lines @@
     virtual void Clear();
 
    private:
     friend class ChannelProxy;
     friend class SendCallbackHelper;
 
     // Create the Channel
     void CreateChannel(const IPC::ChannelHandle& channel_handle,
                        const Channel::Mode& mode);
 
+    // Sends a reply for failed synchronous messages.
+    void SendFailedSyncMessageReply(const Message& message);
+
     // Methods called on the IO thread.
     void OnSendMessage(scoped_ptr<Message> message_ptr);
     void OnAddFilter();
     void OnRemoveFilter(MessageFilter* filter);
 
     // Methods called on the listener thread.
     void AddFilter(MessageFilter* filter);
     void OnDispatchConnected();
     void OnDispatchError();
 
@@ skipping 34 matching lines @@
 
   OutgoingMessageFilter* outgoing_message_filter_;
 
   // Whether the channel has been initialized.
   bool did_init_;
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_PROXY_H_