Use texture-backed VideoFrame pipeline for Aura desktop capturing.

content/browser/media/capture/web_contents_video_capture_device.cc

Index: content/browser/media/capture/web_contents_video_capture_device.cc
diff --git a/content/browser/media/capture/web_contents_video_capture_device.cc b/content/browser/media/capture/web_contents_video_capture_device.cc
index 1ce22a224f26e5446c71a79f1a29ceb5630e8154..5965315e419bad9f6e075fa517c2812cb98971e4 100644
--- a/content/browser/media/capture/web_contents_video_capture_device.cc
+++ b/content/browser/media/capture/web_contents_video_capture_device.cc
@@ -94,21 +94,10 @@ gfx::Rect ComputeYV12LetterboxRegion(const gfx::Size& frame_size,
 
   result.set_x(MakeEven(result.x()));
   result.set_y(MakeEven(result.y()));
-  result.set_width(std::max(kMinFrameWidth, MakeEven(result.width())));
-  result.set_height(std::max(kMinFrameHeight, MakeEven(result.height())));
 
   return result;
 }
 
-// Wrapper function to invoke ThreadSafeCaptureOracle::CaptureFrameCallback, is
-// compatible with RenderWidgetHostViewFrameSubscriber::DeliverFrameCallback.
-void InvokeCaptureFrameCallback(
-    const ThreadSafeCaptureOracle::CaptureFrameCallback& capture_frame_cb,
-    base::TimeTicks timestamp,
-    bool frame_captured) {
-  capture_frame_cb.Run(timestamp, frame_captured);
-}
-
 void DeleteOnWorkerThread(scoped_ptr<base::Thread> render_thread,
                           const base::Closure& callback) {
   render_thread.reset();
@@ -238,8 +227,8 @@ class WebContentsCaptureMachine
   virtual ~WebContentsCaptureMachine();
 
   // VideoCaptureMachine overrides.
-  virtual bool Start(
-      const scoped_refptr<ThreadSafeCaptureOracle>& oracle_proxy) OVERRIDE;
+  virtual bool Start(const scoped_refptr<ThreadSafeCaptureOracle>& oracle_proxy,
+                     const media::VideoCaptureParams& params) OVERRIDE;
   virtual void Stop(const base::Closure& callback) OVERRIDE;
 
   // Starts a copy from the backing store or the composited surface. Must be run
@@ -319,6 +308,9 @@ class WebContentsCaptureMachine
   // Makes all the decisions about which frames to copy, and how.
   scoped_refptr<ThreadSafeCaptureOracle> oracle_proxy_;
 
+  // Video capture parameters that this machine is started with.
+  media::VideoCaptureParams capture_params_;
+
   // Routing ID of any active fullscreen render widget or MSG_ROUTING_NONE
   // otherwise.
   int fullscreen_widget_id_;
@@ -348,7 +340,8 @@ bool FrameSubscriber::ShouldCaptureFrame(
   bool oracle_decision = oracle_proxy_->ObserveEventAndDecideCapture(
       event_type_, present_time, storage, &capture_frame_cb);
 
-  *deliver_frame_cb = base::Bind(&InvokeCaptureFrameCallback, capture_frame_cb);
+  if (!capture_frame_cb.is_null())
+    *deliver_frame_cb = base::Bind(capture_frame_cb, *storage);
   if (oracle_decision)
     delivery_log_->ChronicleFrameDelivery(present_time);
   return oracle_decision;
@@ -578,12 +571,14 @@ WebContentsCaptureMachine::~WebContentsCaptureMachine() {
 }
 
 bool WebContentsCaptureMachine::Start(
-    const scoped_refptr<ThreadSafeCaptureOracle>& oracle_proxy) {
+    const scoped_refptr<ThreadSafeCaptureOracle>& oracle_proxy,
+    const media::VideoCaptureParams& params) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!started_);
 
   DCHECK(oracle_proxy.get());
   oracle_proxy_ = oracle_proxy;
+  capture_params_ = params;
 
   render_thread_.reset(new base::Thread("WebContentsVideo_RenderThread"));
   if (!render_thread_->Start()) {