New FRAME_DURATION VideoFrameMetadata, with Cast Streaming use case.

content/browser/media/capture/video_capture_oracle_unittest.cc

 // 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.
 
 #include "content/browser/media/capture/video_capture_oracle.h"
 
 #include "base/strings/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
@@ skipping 126 matching lines @@
     // dropped, because the AnimatedContentSampler doesn't yet realize the
     // animation ended.  Otherwise, the oracle should always decide to sample
     // because one of its samplers says to.
     const bool require_oracle_says_sample = (i % 100) < 75 || (i % 100) >= 78;
     const bool oracle_says_sample = oracle.ObserveEventAndDecideCapture(
         VideoCaptureOracle::kCompositorUpdate,
         provide_animated_content_event ? animation_damage_rect : gfx::Rect(),
         t);
     if (require_oracle_says_sample)
       ASSERT_TRUE(oracle_says_sample);
-    if (!oracle_says_sample)
+    if (!oracle_says_sample) {
+      ASSERT_EQ(base::TimeDelta(), oracle.estimated_frame_duration());
       continue;
+    }
+    ASSERT_LT(base::TimeDelta(), oracle.estimated_frame_duration());
 
     const int frame_number = oracle.RecordCapture();
 
     base::TimeTicks frame_timestamp;
     ASSERT_TRUE(oracle.CompleteCapture(frame_number, &frame_timestamp));
     ASSERT_FALSE(frame_timestamp.is_null());
     if (!last_frame_timestamp.is_null()) {
       const base::TimeDelta delta = frame_timestamp - last_frame_timestamp;
       EXPECT_LE(event_increment.InMicroseconds(), delta.InMicroseconds());
       // Right after the AnimatedContentSampler lock-out transition, there were
       // a few frames dropped, so allow a gap in the timestamps.  Otherwise, the
       // delta between frame timestamps should never be more than 2X the
       // |event_increment|.
       const base::TimeDelta max_acceptable_delta = (i % 100) == 78 ?
           event_increment * 5 : event_increment * 2;
       EXPECT_GE(max_acceptable_delta.InMicroseconds(), delta.InMicroseconds());
     }
     last_frame_timestamp = frame_timestamp;
   }
 }
 
 }  // namespace content