media: Add UMA to record time to GenerateRequest and LoadSession

media/blink/cdm_session_adapter.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_SESSION_ADAPTER_H_
 #define MEDIA_BLINK_CDM_SESSION_ADAPTER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 112 matching lines @@
                            bool has_additional_usable_key,
                            CdmKeysInfo keys_info);
   void OnSessionExpirationUpdate(const std::string& session_id,
                                  base::Time new_expiry_time);
   void OnSessionClosed(const std::string& session_id);
 
   // Helper function of the callbacks.
   WebContentDecryptionModuleSessionImpl* GetSession(
       const std::string& session_id);
 
-  void ReportTimeToCreateCdmUMA(base::TimeDelta cdm_creation_time) const;
-
   scoped_refptr<ContentDecryptionModule> cdm_;
 
   SessionMap sessions_;
 
   std::string key_system_;
   std::string key_system_uma_prefix_;
 
   // A unique ID to trace CdmSessionAdapter::CreateCdm() call and the matching
   // OnCdmCreated() call.
   uint32_t trace_id_;
 
   std::unique_ptr<blink::WebContentDecryptionModuleResult> cdm_created_result_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<CdmSessionAdapter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CdmSessionAdapter);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_CDM_SESSION_ADAPTER_H_