Connect to DesktopEnvironment's stubs only when audio/video schedulers are about to be created.

remoting/host/mouse_clamping_filter.cc

Index: remoting/host/mouse_clamping_filter.cc
diff --git a/remoting/host/mouse_clamping_filter.cc b/remoting/host/mouse_clamping_filter.cc
index 04ee46cfe70f4bfb288166dc8252aeba5efa292a..afb1577df0328077b315b83df8bfbe0e3b590e96 100644
--- a/remoting/host/mouse_clamping_filter.cc
+++ b/remoting/host/mouse_clamping_filter.cc
@@ -4,24 +4,34 @@
 
 #include "remoting/host/mouse_clamping_filter.h"
 
-#include "remoting/capturer/video_frame_capturer.h"
 #include "remoting/proto/event.pb.h"
+#include "remoting/proto/video.pb.h"
 
 namespace remoting {
 
-MouseClampingFilter::MouseClampingFilter(VideoFrameCapturer* capturer,
-                                         protocol::InputStub* input_stub)
-  : MouseInputFilter(input_stub), capturer_(capturer) {
+MouseClampingFilter::MouseClampingFilter(
+    protocol::InputStub* input_stub,
+    protocol::VideoStub* video_stub)
+    : MouseInputFilter(input_stub),
+      video_stub_(video_stub) {
 }
 
 MouseClampingFilter::~MouseClampingFilter() {
 }
 
-void MouseClampingFilter::InjectMouseEvent(const protocol::MouseEvent& event) {
+void MouseClampingFilter::ProcessVideoPacket(
+    scoped_ptr<VideoPacket> video_packet,
+    const base::Closure& done) {
   // Ensure that the MouseInputFilter is clamping to the current dimensions.

[Wez, 2013/01/08 18:34:00]

nit: "Configure the MouseInputFilter to clamp to the video dimensions." or
possibly just remove this.

[alexeypa (please no reviews), 2013/01/08 20:00:14]

Done.

-  set_output_size(capturer_->size_most_recent());
-  set_input_size(capturer_->size_most_recent());

[Wez, 2013/01/08 18:34:00]

How close are we to being able to remove size_most_recent() from
VideoFrameCapturer?

[alexeypa (please no reviews), 2013/01/08 20:00:14]

I should be able to remove it completely in a follow up CL.

-  MouseInputFilter::InjectMouseEvent(event);
+  if (video_packet->format().has_screen_width() &&
+      video_packet->format().has_screen_height()) {

[Wez, 2013/01/08 18:34:00]

VideoPacket always has valid width & height in our current implementation, and
that's unlikely to change, so I'd suggest DCHECK()ing their presence here.

[alexeypa (please no reviews), 2013/01/08 20:00:14]

Verbatim codec does not always set the width and height. 

[Wez, 2013/01/08 21:02:42]

Hmmm... you really only need width & height on each frame, not each packet, so
that's fair enough I suppose.

+    SkISize screen_size = SkISize::Make(video_packet->format().screen_width(),
+                                        video_packet->format().screen_height());
+    set_input_size(screen_size);
+    set_output_size(screen_size);
+  }
+
+  video_stub_->ProcessVideoPacket(video_packet.Pass(), done);
 }
 
 }  // namespace remoting