Tab capture: Disable use of FrameSubscriber on Aura until it has an implementation.

content/browser/renderer_host/media/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 consumer's
@@ skipping 85 matching lines @@
 
 namespace {
 
 const int kMinFrameWidth = 2;
 const int kMinFrameHeight = 2;
 const int kMaxFramesInFlight = 2;
 const int kMaxSnapshotsInFlight = 1;
 
 // TODO(nick): Remove this once frame subscription is supported on Aura and
 // Linux.
-#if defined(OS_WIN) || defined(OS_MACOSX)
+#if (defined(OS_WIN) || defined(OS_MACOSX)) && !defined(USE_AURA)
 const bool kAcceleratedSubscriberIsSupported = true;
 #else
 const bool kAcceleratedSubscriberIsSupported = false;
 #endif
 
 typedef base::Callback<void(base::Time, bool)> DeliverFrameCallback;
 
 // Returns the nearest even integer closer to zero.
 template<typename IntType>
 IntType MakeEven(IntType x) {
@@ skipping 1186 matching lines @@
     return false;
   else
     return true;
 }
 
 base::Time SmoothEventSampler::GetLastSampledEvent() {
   return last_sample_;
 }
 
 }  // namespace content