Adjust VideoCaptureOracle wrt. out of order captures.

content/browser/media/capture/video_capture_oracle.h

 // Copyright (c) 2013 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.
 
 #ifndef CONTENT_BROWSER_MEDIA_CAPTURE_VIDEO_CAPTURE_ORACLE_H_
 #define CONTENT_BROWSER_MEDIA_CAPTURE_VIDEO_CAPTURE_ORACLE_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
@@ skipping 67 matching lines @@
 
   // Stores the last |event_time| from the last observation/decision.  Used to
   // sanity-check that event times are monotonically non-decreasing.
   base::TimeTicks last_event_time_[kNumEvents];
 
   // Updated by the last call to ObserveEventAndDecideCapture() with the
   // estimated duration of the next frame to sample.  This is zero if the method
   // returned false.
   base::TimeDelta duration_of_next_frame_;
 
-  // Stores the frame number from the last delivered frame.
-  int last_delivered_frame_number_;
+  // Stores the frame number from the last successfully delivered frame.
+  int last_successfully_delivered_frame_number_;
+
+  // Stores the number of pending frame captures.
+  int num_frames_pending_;
 
   // These track present/paint history and propose whether to sample each event
   // for capture.  |smoothing_sampler_| uses a "works for all" heuristic, while
   // |content_sampler_| specifically detects animated content (e.g., video
   // playback) and decides which events to sample to "lock into" that content.
   SmoothEventSampler smoothing_sampler_;
   AnimatedContentSampler content_sampler_;
 
   // Recent history of frame timestamps proposed by VideoCaptureOracle.  This is
   // a ring-buffer, and should only be accessed by the Get/SetFrameTimestamp()
   // methods.
   enum { kMaxFrameTimestamps = 16 };
   base::TimeTicks frame_timestamps_[kMaxFrameTimestamps];
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_VIDEO_CAPTURE_ORACLE_H_