Clean-up: Remove accelerated subscriber switch for tab/desktop capture.

content/browser/media/capture/web_contents_video_capture_device.cc

 // 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.
 //
 // Implementation notes: This needs to work on a variety of hardware
 // configurations where the speed of the CPU and GPU greatly affect overall
 // performance. Spanning several threads, the process of capturing has been
 // split up into four conceptual stages:
 //
 //   1. Reserve Buffer: Before a frame can be captured, a slot in the client's
@@ skipping 322 matching lines @@
       timer_subscriber_(VideoCaptureOracle::kTimerPoll, oracle_proxy,
                         &delivery_log_),
       capture_callback_(capture_callback),
       timer_(true, true) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   RenderWidgetHostView* const view = source.GetView();
 
   // Subscribe to accelerated presents. These will be serviced directly by the
   // oracle.
-  if (view && kAcceleratedSubscriberIsSupported) {
+  if (view) {
     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber(
         new FrameSubscriber(VideoCaptureOracle::kCompositorUpdate,
             oracle_proxy, &delivery_log_));
     view->BeginFrameSubscription(subscriber.Pass());
   }
 
   // Subscribe to software paint events. This instance will service these by
   // reflecting them back to the WebContentsCaptureMachine via
   // |capture_callback|.
   registrar_.Add(
       this, content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
       Source<RenderWidgetHost>(&source));
 
   // Subscribe to timer events. This instance will service these as well.
   timer_.Start(FROM_HERE, oracle_proxy->min_capture_period(),
                base::Bind(&ContentCaptureSubscription::OnTimer,
                           base::Unretained(this)));
 }
 
 ContentCaptureSubscription::~ContentCaptureSubscription() {
   // If the BrowserThreads have been torn down, then the browser is in the final
   // stages of exiting and it is dangerous to take any further action.  We must
   // return early.  http://crbug.com/396413
   if (!BrowserThread::IsMessageLoopValid(BrowserThread::UI))
     return;
 
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  if (kAcceleratedSubscriberIsSupported) {
-    RenderWidgetHost* const source =
-        RenderWidgetHost::FromID(render_process_id_, render_widget_id_);
-    RenderWidgetHostView* const view = source ? source->GetView() : NULL;
-    if (view)
-      view->EndFrameSubscription();
-  }
+  RenderWidgetHost* const source =
+      RenderWidgetHost::FromID(render_process_id_, render_widget_id_);
+  RenderWidgetHostView* const view = source ? source->GetView() : NULL;
+  if (view)
+    view->EndFrameSubscription();
 }
 
 void ContentCaptureSubscription::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK_EQ(NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE, type);
 
   RenderWidgetHostImpl* rwh =
@@ skipping 397 matching lines @@
     scoped_ptr<Client> client) {
   DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString();
   core_->AllocateAndStart(params, client.Pass());
 }
 
 void WebContentsVideoCaptureDevice::StopAndDeAllocate() {
   core_->StopAndDeAllocate();
 }
 
 }  // namespace content