[Chromecast] Add metrics for logging platform A/V bitrate estimates.

chromecast/media/cma/pipeline/av_pipeline_impl.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 "chromecast/media/cma/pipeline/av_pipeline_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 19 matching lines @@
 namespace media {
 
 namespace {
 
 const int kNoCallbackId = -1;
 
 }  // namespace
 
 AvPipelineImpl::AvPipelineImpl(MediaPipelineBackend::Decoder* decoder,
                                const AvPipelineClient& client)
-    : decoder_(decoder),
+    : bytes_decoded_since_last_update_(0),
+      decoder_(decoder),
       client_(client),
       state_(kUninitialized),
       buffered_time_(::media::kNoTimestamp()),
       playable_buffered_time_(::media::kNoTimestamp()),
       enable_feeding_(false),
       pending_read_(false),
       enable_time_update_(false),
       pending_time_update_task_(false),
       media_keys_(NULL),
       media_keys_callback_id_(kNoCallbackId),
@@ skipping 314 matching lines @@
       }
     }
 
     // The frame is playable: remove it from the list of non playable frames.
     non_playable_frames_.pop_front();
   }
 }
 
 }  // namespace media
 }  // namespace chromecast