Add UMA reporting for RTCVideoDecoder.

content/renderer/media/rtc_video_decoder.h

 // Copyright 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_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 163 matching lines @@
 
   // Stores the buffer metadata to |input_buffer_data_|.
   void RecordBufferData(const BufferData& buffer_data);
   // Gets the buffer metadata from |input_buffer_data_|.
   void GetBufferData(int32 bitstream_buffer_id,
                      uint32_t* timestamp,
                      uint32_t* width,
                      uint32_t* height,
                      size_t* size);
 
+  // Records the result of InitDecode to UMA and returns |status|.
+  int32_t RecordInitDecodeUMA(int32_t status);
+
   enum State {
     UNINITIALIZED,  // The decoder has not initialized.
     INITIALIZED,    // The decoder has initialized.
     RESETTING,      // The decoder is being reset.
     DECODE_ERROR,   // Decoding error happened.
   };
 
   static const int32 ID_LAST;     // maximum bitstream buffer id
   static const int32 ID_HALF;     // half of the maximum bitstream buffer id
   static const int32 ID_INVALID;  // indicates Reset or Release never occurred
@@ skipping 71 matching lines @@
   // A buffer that has an id less than this should be dropped because Reset or
   // Release has been called. Guarded by |lock_|.
   int32 reset_bitstream_buffer_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_