[Chromoting] Initial plumbing for cursor shape.

remoting/host/capturer_win.cc

Index: remoting/host/capturer_win.cc
diff --git a/remoting/host/capturer_win.cc b/remoting/host/capturer_win.cc
index e9b65264b0becc874c0b5ddf30ef0fe1ff2f14f4..b2936f634c47705b1ff938fe5b32d049f3372f13 100644
--- a/remoting/host/capturer_win.cc
+++ b/remoting/host/capturer_win.cc
@@ -39,7 +39,7 @@ class CapturerGdi : public Capturer {
   virtual ~CapturerGdi();
 
   // Capturer interface.
-  virtual void Start() OVERRIDE;
+  virtual void Start(const CursorShapeChangedCallback& callback) OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual void ScreenConfigurationChanged() OVERRIDE;
   virtual media::VideoFrame::Format pixel_format() const OVERRIDE;
@@ -214,7 +214,10 @@ void CapturerGdi::ReleaseBuffers() {
   }
 }
 
-void CapturerGdi::Start() {
+void CapturerGdi::Start(
+    const CursorShapeChangedCallback& callback) {
+  cursor_shape_changed_callback_ = callback;
+
   // Load dwmapi.dll dynamically since it is not available on XP.
   if (dwmapi_library_ == NULL) {
     std::string error;
@@ -243,6 +246,12 @@ void CapturerGdi::Stop() {
   }
 }
 
+void CapturerGdi::SetCursorShapeChangedCallback(
+    const CursorShapeChangedCallback& callback) {
+  // TODO(garykac) Implement this. Although as with the screen config changes,
+  // we'll need to poll to look for cursor shape changes. (crbug.com/116299)
+}
+
 void CapturerGdi::ScreenConfigurationChanged() {
   // We poll for screen configuration changes, so ignore notifications.
 }