Add UMA reporting to CdmPromise.

content/renderer/media/cdm_session_adapter.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 "content/renderer/media/cdm_session_adapter.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/stl_util.h"
 #include "content/renderer/media/crypto/content_decryption_module_factory.h"
+#include "content/renderer/media/crypto/key_systems.h"
 #include "content/renderer/media/webcontentdecryptionmodulesession_impl.h"
 #include "media/base/cdm_promise.h"
 #include "media/base/media_keys.h"
 #include "url/gurl.h"
 
 namespace content {
 
+// TODO(sandersd): De-dup with WMPI.

[ddorwin, 2014/08/08 03:35:40]

It's not the end of the world if they are duplicate since that code will be
removed eventually

[sandersd (OOO until July 31), 2014/08/08 17:22:24]

Done.

+const char kMediaEME[] = "Media.EME.";
+
 CdmSessionAdapter::CdmSessionAdapter() :
 #if defined(ENABLE_BROWSER_CDMS)
     cdm_id_(0),
 #endif
     weak_ptr_factory_(this) {}
 
 CdmSessionAdapter::~CdmSessionAdapter() {}
 
 bool CdmSessionAdapter::Initialize(
 #if defined(ENABLE_PEPPER_CDMS)
     const CreatePepperCdmCB& create_pepper_cdm_cb,
 #elif defined(ENABLE_BROWSER_CDMS)
     RendererCdmManager* manager,
 #endif  // defined(ENABLE_PEPPER_CDMS)
     const std::string& key_system,
     const GURL& security_origin) {
+  key_system_uma_prefix_ = kMediaEME + KeySystemNameForUMA(key_system);
   base::WeakPtr<CdmSessionAdapter> weak_this = weak_ptr_factory_.GetWeakPtr();
   media_keys_ = ContentDecryptionModuleFactory::Create(
       key_system,
       security_origin,
 #if defined(ENABLE_PEPPER_CDMS)
       create_pepper_cdm_cb,
 #elif defined(ENABLE_BROWSER_CDMS)
       manager,
       &cdm_id_,
 #endif  // defined(ENABLE_PEPPER_CDMS)
@@ skipping 51 matching lines @@
 void CdmSessionAdapter::ReleaseSession(
     const std::string& web_session_id,
     scoped_ptr<media::SimpleCdmPromise> promise) {
   media_keys_->ReleaseSession(web_session_id, promise.Pass());
 }
 
 media::Decryptor* CdmSessionAdapter::GetDecryptor() {
   return media_keys_->GetDecryptor();
 }
 
+const std::string& CdmSessionAdapter::GetKeySystemUMAPrefix() {
+  return key_system_uma_prefix_;
+}
+
 #if defined(ENABLE_BROWSER_CDMS)
 int CdmSessionAdapter::GetCdmId() const {
   return cdm_id_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 void CdmSessionAdapter::OnSessionMessage(const std::string& web_session_id,
                                          const std::vector<uint8>& message,
                                          const GURL& destination_url) {
   WebContentDecryptionModuleSessionImpl* session = GetSession(web_session_id);
@@ skipping 34 matching lines @@
 WebContentDecryptionModuleSessionImpl* CdmSessionAdapter::GetSession(
     const std::string& web_session_id) {
   // Since session objects may get garbage collected, it is possible that there
   // are events coming back from the CDM and the session has been unregistered.
   // We can not tell if the CDM is firing events at sessions that never existed.
   SessionMap::iterator session = sessions_.find(web_session_id);
   return (session != sessions_.end()) ? session->second.get() : NULL;
 }
 
 }  // namespace content