[Pepper GL] Use shared state to fix a memory leak in MapSub GL extension.

ppapi/proxy/ppapi_messages.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.
 
 // Multiply-included message header, no traditional include guard.
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 838 matching lines @@
                     ppapi::HostResource /* audio_id */,
                     bool /* play */)
 
 // PPB_Core.
 IPC_MESSAGE_ROUTED1(PpapiHostMsg_PPBCore_AddRefResource,
                     ppapi::HostResource)
 IPC_MESSAGE_ROUTED1(PpapiHostMsg_PPBCore_ReleaseResource,
                     ppapi::HostResource)
 
 // PPB_Graphics3D.
-IPC_SYNC_MESSAGE_ROUTED3_1(PpapiHostMsg_PPBGraphics3D_Create,
+IPC_SYNC_MESSAGE_ROUTED3_2(PpapiHostMsg_PPBGraphics3D_Create,
                            PP_Instance /* instance */,
                            ppapi::HostResource /* share_context */,
                            std::vector<int32_t> /* attrib_list */,
-                           ppapi::HostResource /* result */)
+                           ppapi::HostResource /* result */,
+                           ppapi::proxy::SerializedHandle /* shared_state */)
 IPC_SYNC_MESSAGE_ROUTED2_0(PpapiHostMsg_PPBGraphics3D_SetGetBuffer,
                            ppapi::HostResource /* context */,
                            int32 /* transfer_buffer_id */)
 IPC_SYNC_MESSAGE_ROUTED3_2(PpapiHostMsg_PPBGraphics3D_WaitForTokenInRange,
                            ppapi::HostResource /* context */,
                            int32 /* start */,
                            int32 /* end */,
                            gpu::CommandBuffer::State /* state */,
                            bool /* success */)
 IPC_SYNC_MESSAGE_ROUTED3_2(PpapiHostMsg_PPBGraphics3D_WaitForGetOffsetInRange,
@@ skipping 1367 matching lines @@
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_Talk_RequestPermission,
                      PP_TalkPermission /* permission */)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_RequestPermissionReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StartRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StartRemotingReply)
 IPC_MESSAGE_CONTROL0(PpapiHostMsg_Talk_StopRemoting)
 IPC_MESSAGE_CONTROL0(PpapiPluginMsg_Talk_StopRemotingReply)
 IPC_MESSAGE_CONTROL1(PpapiPluginMsg_Talk_NotifyEvent, PP_TalkEvent /* event */)
 
 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)