Two chagnes to cast socket:

chrome/browser/extensions/api/cast_channel/cast_socket.h

Index: chrome/browser/extensions/api/cast_channel/cast_socket.h
===================================================================
--- chrome/browser/extensions/api/cast_channel/cast_socket.h	(revision 250590)
+++ chrome/browser/extensions/api/cast_channel/cast_socket.h	(working copy)
@@ -16,7 +16,6 @@
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/extensions/api/api_resource.h"
 #include "chrome/browser/extensions/api/api_resource_manager.h"
-#include "chrome/browser/extensions/api/cast_channel/cast_channel.pb.h"
 #include "chrome/common/extensions/api/cast_channel.h"
 #include "net/base/completion_callback.h"
 #include "net/base/io_buffer.h"
@@ -37,6 +36,8 @@
 namespace api {
 namespace cast_channel {
 
+class CastMessage;
+
 // Size (in bytes) of the largest allowed message payload on the wire (without
 // the header).
 extern const uint32 kMaxMessageSize;
@@ -277,7 +278,7 @@
   // The number of bytes in the current message body.
   uint32 current_message_size_;
   // Last message received on the socket.
-  CastMessage current_message_;
+  scoped_ptr<CastMessage> current_message_;
 
   // The NetLog for this service.
   net::NetLog* net_log_;