CdmAdapter: Report size of the file read by CDM via FileIO.

media/cdm/ppapi/cdm_adapter.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 MEDIA_CDM_PPAPI_CDM_ADAPTER_H_
 #define MEDIA_CDM_PPAPI_CDM_ADAPTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 229 matching lines @@
   void DeliverSamples(int32_t result,
                       const cdm::Status& status,
                       const LinkedAudioFrames& audio_frames,
                       const PP_DecryptTrackingInfo& tracking_info);
 
   // Helper for SetTimer().
   void TimerExpired(int32_t result, void* context);
 
   bool IsValidVideoFrame(const LinkedVideoFrame& video_frame);
 
+  // Callback to report |file_size_bytes| of the first file read by FileIO.
+  void OnFirstFileRead(int32_t file_size_bytes);
+
 #if !defined(NDEBUG)
   // Logs the given message to the JavaScript console associated with the
   // CDM adapter instance. The name of the CDM adapter issuing the log message
   // will be automatically prepended to the message.
   void LogToConsole(const pp::Var& value);
 #endif  // !defined(NDEBUG)
 
 #if defined(OS_CHROMEOS)
   void ReportOutputProtectionUMA(OutputProtectionStatus status);
   void ReportOutputProtectionQuery();
@@ skipping 31 matching lines @@
   std::string key_system_;
 
   // If the CDM returned kDeferredInitialization during InitializeAudioDecoder()
   // or InitializeVideoDecoder(), the (Audio|Video)DecoderConfig.request_id is
   // saved for the future call to OnDeferredInitializationDone().
   bool deferred_initialize_audio_decoder_;
   uint32_t deferred_audio_decoder_config_id_;
   bool deferred_initialize_video_decoder_;
   uint32_t deferred_video_decoder_config_id_;
 
+  uint32_t last_read_file_size_kb_;
+  bool file_size_uma_reported_;
+
   DISALLOW_COPY_AND_ASSIGN(CdmAdapter);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_PPAPI_CDM_ADAPTER_H_