media: Add UMA to record time to GenerateRequest and LoadSession

media/blink/cdm_result_promise_helper.h

 // 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.
 
 #ifndef MEDIA_BLINK_CDM_RESULT_PROMISE_HELPER_H_
 #define MEDIA_BLINK_CDM_RESULT_PROMISE_HELPER_H_
 
 #include <string>
 
+#include "base/time/time.h"
 #include "media/base/cdm_promise.h"
 #include "media/blink/media_blink_export.h"
 #include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
 
 namespace media {
 
 // A superset of media::ContentDecryptionModule::Exception for UMA reporting.
 // These values should never be changed as it will affect existing reporting,
 // and must match the values for CdmPromiseResult in
 // tools/metrics/histograms/histograms.xml.
@@ skipping 11 matching lines @@
 
 MEDIA_BLINK_EXPORT CdmResultForUMA
 ConvertCdmExceptionToResultForUMA(CdmPromise::Exception exception_code);
 
 MEDIA_BLINK_EXPORT blink::WebContentDecryptionModuleException
 ConvertCdmException(CdmPromise::Exception exception_code);
 
 MEDIA_BLINK_EXPORT void ReportCdmResultUMA(const std::string& uma_name,
                                            CdmResultForUMA result);
 
+MEDIA_BLINK_EXPORT void ReportTimeUMA(const std::string& uma_name,
+                                      base::TimeDelta time);
+
 }  // namespace media
 
 #endif  // MEDIA_BLINK_CDM_RESULT_PROMISE_HELPER_H_