[Cast] Track audio queued in encoder; account for it in ShouldDropNextFrame().

media/cast/sender/audio_encoder_unittest.cc

 // Copyright 2014 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 <stdint.h>
 
 #include <sstream>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 21 matching lines @@
   virtual ~TestEncodedAudioFrameReceiver() {}
 
   int frames_received() const { return frames_received_; }
 
   void SetCaptureTimeBounds(const base::TimeTicks& lower_bound,
                             const base::TimeTicks& upper_bound) {
     lower_bound_ = lower_bound;
     upper_bound_ = upper_bound;
   }
 
-  void FrameEncoded(scoped_ptr<EncodedFrame> encoded_frame) {
+  void FrameEncoded(scoped_ptr<EncodedFrame> encoded_frame,
+                    int samples_skipped) {
     EXPECT_EQ(encoded_frame->dependency, EncodedFrame::KEY);
     EXPECT_EQ(static_cast<uint8>(frames_received_ & 0xff),
               encoded_frame->frame_id);
     EXPECT_EQ(encoded_frame->frame_id, encoded_frame->referenced_frame_id);
     // RTP timestamps should be monotonically increasing and integer multiples
     // of the fixed frame size.
     EXPECT_LE(rtp_lower_bound_, encoded_frame->rtp_timestamp);
     rtp_lower_bound_ = encoded_frame->rtp_timestamp;
     // Note: In audio_encoder.cc, 100 is the fixed audio frame rate.
     const int kSamplesPerFrame = kDefaultAudioSamplingRate / 100;
@@ skipping 179 matching lines @@
         TestScenario(kManyCalls_Mixed2, arraysize(kManyCalls_Mixed2)),
         TestScenario(kManyCalls_Mixed3, arraysize(kManyCalls_Mixed3)),
         TestScenario(kManyCalls_Mixed4, arraysize(kManyCalls_Mixed4)),
         TestScenario(kManyCalls_Mixed5, arraysize(kManyCalls_Mixed5)),
         TestScenario(kOneBigUnderrun, arraysize(kOneBigUnderrun)),
         TestScenario(kTwoBigUnderruns, arraysize(kTwoBigUnderruns)),
         TestScenario(kMixedUnderruns, arraysize(kMixedUnderruns))));
 
 }  // namespace cast
 }  // namespace media