Use webrtc::MouseCursorMonitor for cursor shapes

remoting/host/chromoting_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.
 
 #ifndef REMOTING_HOST_CHROMOTING_MESSAGES_H_
 #define REMOTING_HOST_CHROMOTING_MESSAGES_H_
 
 #include "ipc/ipc_platform_file.h"
 #include "net/base/ip_endpoint.h"
 #include "remoting/host/chromoting_param_traits.h"
@@ skipping 120 matching lines @@
 // Notifies the network process that a shared buffer has been created.
 IPC_MESSAGE_CONTROL3(ChromotingDesktopNetworkMsg_CreateSharedBuffer,
                      int /* id */,
                      IPC::PlatformFileForTransit /* handle */,
                      uint32 /* size */)
 
 // Request the network process to stop using a shared buffer.
 IPC_MESSAGE_CONTROL1(ChromotingDesktopNetworkMsg_ReleaseSharedBuffer,
                      int /* id */)
 
-IPC_STRUCT_TRAITS_BEGIN(webrtc::MouseCursorShape)
-  IPC_STRUCT_TRAITS_MEMBER(size)
-  IPC_STRUCT_TRAITS_MEMBER(hotspot)
-  IPC_STRUCT_TRAITS_MEMBER(data)
-IPC_STRUCT_TRAITS_END()
-
 // Serialized webrtc::DesktopFrame.
 IPC_STRUCT_BEGIN(SerializedDesktopFrame)
   // ID of the shared memory buffer containing the pixels.
   IPC_STRUCT_MEMBER(int, shared_buffer_id)
 
   // Width of a single row of pixels in bytes.
   IPC_STRUCT_MEMBER(int, bytes_per_row)
 
   // Captured region.
   IPC_STRUCT_MEMBER(std::vector<webrtc::DesktopRect>, dirty_region)
 
   // Dimensions of the buffer in pixels.
   IPC_STRUCT_MEMBER(webrtc::DesktopSize, dimensions)
 
   // Time spent in capture. Unit is in milliseconds.
   IPC_STRUCT_MEMBER(int, capture_time_ms)
 
   // Sequence number supplied by client for performance tracking.
   IPC_STRUCT_MEMBER(int64, client_sequence_number)
 
   // DPI for this frame.
   IPC_STRUCT_MEMBER(webrtc::DesktopVector, dpi)
 IPC_STRUCT_END()
 
 // Notifies the network process that a shared buffer has been created.
 IPC_MESSAGE_CONTROL1(ChromotingDesktopNetworkMsg_CaptureCompleted,
                      SerializedDesktopFrame /* frame */ )
 
 // Carries a cursor share update from the desktop session agent to the client.
-IPC_MESSAGE_CONTROL1(ChromotingDesktopNetworkMsg_CursorShapeChanged,
-                     webrtc::MouseCursorShape /* cursor_shape */ )
+// N.B. |webrtc::MouseCursor| is immutable which makes it non-serializable by
+// the IPC library. We work around this limitation by passing a scoped_ptr
+// instead. |cursor| must be non-NULL.
+IPC_MESSAGE_CONTROL1(ChromotingDesktopNetworkMsg_MouseCursor,
+                     scoped_ptr<webrtc::MouseCursor> /* cursor */ )
 
 // Carries a clipboard event from the desktop session agent to the client.
 // |serialized_event| is a serialized protocol::ClipboardEvent.
 IPC_MESSAGE_CONTROL1(ChromotingDesktopNetworkMsg_InjectClipboardEvent,
                      std::string /* serialized_event */ )
 
 // Requests the network process to terminate the client session.
 IPC_MESSAGE_CONTROL0(ChromotingDesktopNetworkMsg_DisconnectSession)
 
 // Carries an audio packet from the desktop session agent to the client.
@@ skipping 24 matching lines @@
                      std::string /* serialized_event */ )
 
 // Carries a mouse event from the client to the desktop session agent.
 // |serialized_event| is a serialized protocol::MouseEvent.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkDesktopMsg_InjectMouseEvent,
                      std::string /* serialized_event */ )
 
 // Changes the screen resolution in the desktop session.
 IPC_MESSAGE_CONTROL1(ChromotingNetworkDesktopMsg_SetScreenResolution,
                      remoting::ScreenResolution /* resolution */)