Rename EME WD call parameters

Rename parameters on EME WD calls to be consistent.

BUG=224786
TEST=compiles

Review URL: https://codereview.chromium.org/105383002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239698 0039d316-1c4b-4281-b951-d872f2087c98

8 files changed, 211 insertions, 216 deletions

diff --git a/media/cdm/aes_decryptor.cc b/media/cdm/aes_decryptor.cc
index ee4b987..bdcc27e 100644
--- a/media/cdm/aes_decryptor.cc
+++ b/media/cdm/aes_decryptor.cc
@@ -20,7 +20,7 @@
 
 namespace media {
 
-uint32 AesDecryptor::next_session_id_ = 1;
+uint32 AesDecryptor::next_web_session_id_ = 1;
 
 enum ClearBytesBufferSel {
   kSrcContainsClearBytes,
@@ -157,11 +157,11 @@ AesDecryptor::~AesDecryptor() {
   STLDeleteValues(&key_map_);
 }
 
-bool AesDecryptor::CreateSession(uint32 reference_id,
+bool AesDecryptor::CreateSession(uint32 session_id,
                                  const std::string& type,
                                  const uint8* init_data,
                                  int init_data_length) {
-  std::string session_id_string(base::UintToString(next_session_id_++));
+  std::string web_session_id_string(base::UintToString(next_web_session_id_++));
 
   // For now, the AesDecryptor does not care about |type|;
   // just fire the event with the |init_data| as the request.
@@ -169,12 +169,12 @@ bool AesDecryptor::CreateSession(uint32 reference_id,
   if (init_data && init_data_length)
     message.assign(init_data, init_data + init_data_length);
 
-  session_created_cb_.Run(reference_id, session_id_string);
-  session_message_cb_.Run(reference_id, message, std::string());
+  session_created_cb_.Run(session_id, web_session_id_string);
+  session_message_cb_.Run(session_id, message, std::string());
   return true;
 }
 
-void AesDecryptor::UpdateSession(uint32 reference_id,
+void AesDecryptor::UpdateSession(uint32 session_id,
                                  const uint8* response,
                                  int response_length) {
   CHECK(response);
@@ -184,13 +184,13 @@ void AesDecryptor::UpdateSession(uint32 reference_id,
                          response_length);
   KeyIdAndKeyPairs keys;
   if (!ExtractKeysFromJWKSet(key_string, &keys)) {
-    session_error_cb_.Run(reference_id, MediaKeys::kUnknownError, 0);
+    session_error_cb_.Run(session_id, MediaKeys::kUnknownError, 0);
     return;
   }
 
   // Make sure that at least one key was extracted.
   if (keys.empty()) {
-    session_error_cb_.Run(reference_id, MediaKeys::kUnknownError, 0);
+    session_error_cb_.Run(session_id, MediaKeys::kUnknownError, 0);
     return;
   }
 
@@ -198,11 +198,11 @@ void AesDecryptor::UpdateSession(uint32 reference_id,
     if (it->second.length() !=
         static_cast<size_t>(DecryptConfig::kDecryptionKeySize)) {
       DVLOG(1) << "Invalid key length: " << key_string.length();
-      session_error_cb_.Run(reference_id, MediaKeys::kUnknownError, 0);
+      session_error_cb_.Run(session_id, MediaKeys::kUnknownError, 0);
       return;
     }
     if (!AddDecryptionKey(it->first, it->second)) {
-      session_error_cb_.Run(reference_id, MediaKeys::kUnknownError, 0);
+      session_error_cb_.Run(session_id, MediaKeys::kUnknownError, 0);
       return;
     }
   }
@@ -213,10 +213,10 @@ void AesDecryptor::UpdateSession(uint32 reference_id,
   if (!new_video_key_cb_.is_null())
     new_video_key_cb_.Run();
 
-  session_ready_cb_.Run(reference_id);
+  session_ready_cb_.Run(session_id);
 }
 
-void AesDecryptor::ReleaseSession(uint32 reference_id) {
+void AesDecryptor::ReleaseSession(uint32 session_id) {
   // TODO: Implement: http://crbug.com/313412.
 }
 
diff --git a/media/cdm/aes_decryptor.h b/media/cdm/aes_decryptor.h
index 8e03106..35b1488 100644
--- a/media/cdm/aes_decryptor.h
+++ b/media/cdm/aes_decryptor.h
@@ -35,14 +35,14 @@ class MEDIA_EXPORT AesDecryptor : public MediaKeys, public Decryptor {
   virtual ~AesDecryptor();
 
   // MediaKeys implementation.
-  virtual bool CreateSession(uint32 reference_id,
+  virtual bool CreateSession(uint32 session_id,
                              const std::string& type,
                              const uint8* init_data,
                              int init_data_length) OVERRIDE;
-  virtual void UpdateSession(uint32 reference_id,
+  virtual void UpdateSession(uint32 session_id,
                              const uint8* response,
                              int response_length) OVERRIDE;
-  virtual void ReleaseSession(uint32 reference_id) OVERRIDE;
+  virtual void ReleaseSession(uint32 session_id) OVERRIDE;
   virtual Decryptor* GetDecryptor() OVERRIDE;
 
   // Decryptor implementation.
@@ -115,10 +115,9 @@ class MEDIA_EXPORT AesDecryptor : public MediaKeys, public Decryptor {
   KeyMap key_map_;  // Protected by the |key_map_lock_|.
   mutable base::Lock key_map_lock_;  // Protects the |key_map_|.
 
-  // Make session ID unique per renderer by making it static.
-  // TODO(xhwang): Make session ID more strictly defined if needed:
-  // https://www.w3.org/Bugs/Public/show_bug.cgi?id=16739#c0
-  static uint32 next_session_id_;
+  // Make web session ID unique per renderer by making it static. Web session
+  // IDs seen by the app will be "1", "2", etc.
+  static uint32 next_web_session_id_;
 
   NewKeyCB new_audio_key_cb_;
   NewKeyCB new_video_key_cb_;
diff --git a/media/cdm/aes_decryptor_unittest.cc b/media/cdm/aes_decryptor_unittest.cc
index cd0d460..53c7f1a8 100644
--- a/media/cdm/aes_decryptor_unittest.cc
+++ b/media/cdm/aes_decryptor_unittest.cc
@@ -195,7 +195,7 @@ class AesDecryptorTest : public testing::Test {
                               base::Unretained(this)),
                    base::Bind(&AesDecryptorTest::OnSessionError,
                               base::Unretained(this))),
-        reference_id_(MediaKeys::kInvalidReferenceId),
+        session_id_(MediaKeys::kInvalidSessionId),
         decrypt_cb_(base::Bind(&AesDecryptorTest::BufferDecrypted,
                                base::Unretained(this))),
         original_data_(kOriginalData, kOriginalData + kOriginalDataSize),
@@ -213,12 +213,12 @@ class AesDecryptorTest : public testing::Test {
 
  protected:
   void CreateSession(const std::vector<uint8>& key_id) {
-    reference_id_ = 6;
+    session_id_ = 6;
     DCHECK(!key_id.empty());
-    EXPECT_CALL(*this, OnSessionCreated(reference_id_, StrNe(std::string())));
-    EXPECT_CALL(*this, OnSessionMessage(reference_id_, key_id, ""));
+    EXPECT_CALL(*this, OnSessionCreated(session_id_, StrNe(std::string())));
+    EXPECT_CALL(*this, OnSessionMessage(session_id_, key_id, ""));
     EXPECT_TRUE(decryptor_.CreateSession(
-        reference_id_, std::string(), &key_id[0], key_id.size()));
+        session_id_, std::string(), &key_id[0], key_id.size()));
   }
 
   enum AddKeyExpectation {
@@ -230,17 +230,16 @@ class AesDecryptorTest : public testing::Test {
     DCHECK(!key.empty());
 
     if (result == KEY_ADDED) {
-      EXPECT_CALL(*this, OnSessionReady(reference_id_));
+      EXPECT_CALL(*this, OnSessionReady(session_id_));
     } else if (result == KEY_ERROR) {
       EXPECT_CALL(*this,
-                  OnSessionError(reference_id_, MediaKeys::kUnknownError, 0));
+                  OnSessionError(session_id_, MediaKeys::kUnknownError, 0));
     } else {
       NOTREACHED();
     }
 
-    decryptor_.UpdateSession(reference_id_,
-                             reinterpret_cast<const uint8*>(key.c_str()),
-                             key.length());
+    decryptor_.UpdateSession(
+        session_id_, reinterpret_cast<const uint8*>(key.c_str()), key.length());
   }
 
   MOCK_METHOD2(BufferDecrypted, void(Decryptor::Status,
@@ -292,18 +291,18 @@ class AesDecryptorTest : public testing::Test {
   }
 
   MOCK_METHOD2(OnSessionCreated,
-               void(uint32 reference_id, const std::string& session_id));
+               void(uint32 session_id, const std::string& web_session_id));
   MOCK_METHOD3(OnSessionMessage,
-               void(uint32 reference_id,
+               void(uint32 session_id,
                     const std::vector<uint8>& message,
                     const std::string& default_url));
-  MOCK_METHOD1(OnSessionReady, void(uint32 reference_id));
-  MOCK_METHOD1(OnSessionClosed, void(uint32 reference_id));
+  MOCK_METHOD1(OnSessionReady, void(uint32 session_id));
+  MOCK_METHOD1(OnSessionClosed, void(uint32 session_id));
   MOCK_METHOD3(OnSessionError,
-               void(uint32 reference_id, MediaKeys::KeyError, int system_code));
+               void(uint32 session_id, MediaKeys::KeyError, int system_code));
 
   AesDecryptor decryptor_;
-  uint32 reference_id_;
+  uint32 session_id_;
   AesDecryptor::DecryptCB decrypt_cb_;
 
   // Constants for testing.
@@ -317,27 +316,27 @@ class AesDecryptorTest : public testing::Test {
 };
 
 TEST_F(AesDecryptorTest, CreateSessionWithNullInitData) {
-  reference_id_ = 8;
-  EXPECT_CALL(*this, OnSessionMessage(reference_id_, IsEmpty(), ""));
-  EXPECT_CALL(*this, OnSessionCreated(reference_id_, StrNe(std::string())));
-  EXPECT_TRUE(decryptor_.CreateSession(reference_id_, std::string(), NULL, 0));
+  session_id_ = 8;
+  EXPECT_CALL(*this, OnSessionMessage(session_id_, IsEmpty(), ""));
+  EXPECT_CALL(*this, OnSessionCreated(session_id_, StrNe(std::string())));
+  EXPECT_TRUE(decryptor_.CreateSession(session_id_, std::string(), NULL, 0));
 }
 
 TEST_F(AesDecryptorTest, MultipleCreateSession) {
-  uint32 reference_id1 = 10;
-  EXPECT_CALL(*this, OnSessionMessage(reference_id1, IsEmpty(), ""));
-  EXPECT_CALL(*this, OnSessionCreated(reference_id1, StrNe(std::string())));
-  EXPECT_TRUE(decryptor_.CreateSession(reference_id1, std::string(), NULL, 0));
-
-  uint32 reference_id2 = 11;
-  EXPECT_CALL(*this, OnSessionMessage(reference_id2, IsEmpty(), ""));
-  EXPECT_CALL(*this, OnSessionCreated(reference_id2, StrNe(std::string())));
-  EXPECT_TRUE(decryptor_.CreateSession(reference_id2, std::string(), NULL, 0));
-
-  uint32 reference_id3 = 23;
-  EXPECT_CALL(*this, OnSessionMessage(reference_id3, IsEmpty(), ""));
-  EXPECT_CALL(*this, OnSessionCreated(reference_id3, StrNe(std::string())));
-  EXPECT_TRUE(decryptor_.CreateSession(reference_id3, std::string(), NULL, 0));
+  uint32 session_id1 = 10;
+  EXPECT_CALL(*this, OnSessionMessage(session_id1, IsEmpty(), ""));
+  EXPECT_CALL(*this, OnSessionCreated(session_id1, StrNe(std::string())));
+  EXPECT_TRUE(decryptor_.CreateSession(session_id1, std::string(), NULL, 0));
+
+  uint32 session_id2 = 11;
+  EXPECT_CALL(*this, OnSessionMessage(session_id2, IsEmpty(), ""));
+  EXPECT_CALL(*this, OnSessionCreated(session_id2, StrNe(std::string())));
+  EXPECT_TRUE(decryptor_.CreateSession(session_id2, std::string(), NULL, 0));
+
+  uint32 session_id3 = 23;
+  EXPECT_CALL(*this, OnSessionMessage(session_id3, IsEmpty(), ""));
+  EXPECT_CALL(*this, OnSessionCreated(session_id3, StrNe(std::string())));
+  EXPECT_TRUE(decryptor_.CreateSession(session_id3, std::string(), NULL, 0));
 }
 
 TEST_F(AesDecryptorTest, NormalDecryption) {
diff --git a/media/cdm/ppapi/cdm_adapter.cc b/media/cdm/ppapi/cdm_adapter.cc
index 489eb1d..209335b 100644
--- a/media/cdm/ppapi/cdm_adapter.cc
+++ b/media/cdm/ppapi/cdm_adapter.cc
@@ -247,13 +247,13 @@ void CdmAdapter::Initialize(const std::string& key_system) {
   key_system_ = key_system;
 }
 
-void CdmAdapter::CreateSession(uint32_t reference_id,
+void CdmAdapter::CreateSession(uint32_t session_id,
                                const std::string& type,
                                pp::VarArrayBuffer init_data) {
   // Initialize() doesn't report an error, so CreateSession() can be called
   // even if Initialize() failed.
   if (!cdm_) {
-    OnSessionError(reference_id, cdm::kUnknownError, 0);
+    OnSessionError(session_id, cdm::kUnknownError, 0);
     return;
   }
 
@@ -261,7 +261,7 @@ void CdmAdapter::CreateSession(uint32_t reference_id,
   PP_URLComponents_Dev url_components = {};
   const pp::URLUtil_Dev* url_util = pp::URLUtil_Dev::Get();
   if (!url_util) {
-    OnSessionError(reference_id, cdm::kUnknownError, 0);
+    OnSessionError(session_id, cdm::kUnknownError, 0);
     return;
   }
   pp::Var href = url_util->GetDocumentURL(
@@ -272,19 +272,19 @@ void CdmAdapter::CreateSession(uint32_t reference_id,
   PP_DCHECK(0 < url_components.host.len);
 #endif  // defined(CHECK_DOCUMENT_URL)
 
-  cdm_->CreateSession(reference_id,
+  cdm_->CreateSession(session_id,
                       type.data(),
                       type.size(),
                       static_cast<const uint8_t*>(init_data.Map()),
                       init_data.ByteLength());
 }
 
-void CdmAdapter::UpdateSession(uint32_t reference_id,
+void CdmAdapter::UpdateSession(uint32_t session_id,
                                pp::VarArrayBuffer response) {
   // TODO(jrummell): In EME WD, AddKey() can only be called on valid sessions.
   // We should be able to DCHECK(cdm_) when addressing http://crbug.com/249976.
   if (!cdm_) {
-    OnSessionError(reference_id, cdm::kUnknownError, 0);
+    OnSessionError(session_id, cdm::kUnknownError, 0);
     return;
   }
 
@@ -292,32 +292,32 @@ void CdmAdapter::UpdateSession(uint32_t reference_id,
   const uint32_t response_size = response.ByteLength();
 
   if (!response_ptr || response_size <= 0) {
-    OnSessionError(reference_id, cdm::kUnknownError, 0);
+    OnSessionError(session_id, cdm::kUnknownError, 0);
     return;
   }
   CdmWrapper::Result result =
-      cdm_->UpdateSession(reference_id, response_ptr, response_size);
+      cdm_->UpdateSession(session_id, response_ptr, response_size);
   switch (result) {
     case CdmWrapper::NO_ACTION:
       break;
     case CdmWrapper::CALL_KEY_ADDED:
-      OnSessionReady(reference_id);
+      OnSessionReady(session_id);
       break;
     case CdmWrapper::CALL_KEY_ERROR:
-      OnSessionError(reference_id, cdm::kUnknownError, 0);
+      OnSessionError(session_id, cdm::kUnknownError, 0);
       break;
   }
 }
 
-void CdmAdapter::ReleaseSession(uint32_t reference_id) {
+void CdmAdapter::ReleaseSession(uint32_t session_id) {
   // TODO(jrummell): In EME WD, AddKey() can only be called on valid sessions.
   // We should be able to DCHECK(cdm_) when addressing http://crbug.com/249976.
   if (!cdm_) {
-    OnSessionError(reference_id, cdm::kUnknownError, 0);
+    OnSessionError(session_id, cdm::kUnknownError, 0);
     return;
   }
 
-  CdmWrapper::Result result = cdm_->ReleaseSession(reference_id);
+  CdmWrapper::Result result = cdm_->ReleaseSession(session_id);
   switch (result) {
     case CdmWrapper::NO_ACTION:
       break;
@@ -325,7 +325,7 @@ void CdmAdapter::ReleaseSession(uint32_t reference_id) {
       PP_NOTREACHED();
       break;
     case CdmWrapper::CALL_KEY_ERROR:
-      OnSessionError(reference_id, cdm::kUnknownError, 0);
+      OnSessionError(session_id, cdm::kUnknownError, 0);
       break;
   }
 }
@@ -536,11 +536,12 @@ void CdmAdapter::SendKeyMessage(
 
   std::string session_id_str(session_id, session_id_length);
   PP_DCHECK(!session_id_str.empty());
-  uint32_t reference_id = cdm_->DetermineReferenceId(session_id_str);
+  uint32_t session_reference_id = cdm_->LookupSessionId(session_id_str);
 
-  OnSessionCreated(reference_id, session_id, session_id_length);
-  OnSessionMessage(
-      reference_id, message, message_length, default_url, default_url_length);
+  OnSessionCreated(session_reference_id, session_id, session_id_length);
+  OnSessionMessage(session_reference_id,
+                   message, message_length,
+                   default_url, default_url_length);
 }
 
 void CdmAdapter::SendKeyError(const char* session_id,
@@ -548,8 +549,8 @@ void CdmAdapter::SendKeyError(const char* session_id,
                               cdm::MediaKeyError error_code,
                               uint32_t system_code) {
   std::string session_id_str(session_id, session_id_length);
-  uint32_t reference_id = cdm_->DetermineReferenceId(session_id_str);
-  OnSessionError(reference_id, error_code, system_code);
+  uint32_t session_reference_id = cdm_->LookupSessionId(session_id_str);
+  OnSessionError(session_reference_id, error_code, system_code);
 }
 
 void CdmAdapter::GetPrivateData(int32_t* instance,
@@ -558,56 +559,56 @@ void CdmAdapter::GetPrivateData(int32_t* instance,
   *get_interface = pp::Module::Get()->get_browser_interface();
 }
 
-void CdmAdapter::OnSessionCreated(uint32_t reference_id,
-                                  const char* session_id,
-                                  uint32_t session_id_length) {
+void CdmAdapter::OnSessionCreated(uint32_t session_id,
+                                  const char* web_session_id,
+                                  uint32_t web_session_id_length) {
   PostOnMain(callback_factory_.NewCallback(
       &CdmAdapter::SendSessionCreatedInternal,
-      reference_id,
-      std::string(session_id, session_id_length)));
+      session_id,
+      std::string(web_session_id, web_session_id_length)));
 }
 
-void CdmAdapter::OnSessionMessage(uint32_t reference_id,
+void CdmAdapter::OnSessionMessage(uint32_t session_id,
                                   const char* message,
                                   uint32_t message_length,
                                   const char* destination_url,
                                   uint32_t destination_url_length) {
   PostOnMain(callback_factory_.NewCallback(
       &CdmAdapter::SendSessionMessageInternal,
-      reference_id,
+      session_id,
       std::vector<uint8>(message, message + message_length),
       std::string(destination_url, destination_url_length)));
 }
 
-void CdmAdapter::OnSessionReady(uint32_t reference_id) {
+void CdmAdapter::OnSessionReady(uint32_t session_id) {
   PostOnMain(callback_factory_.NewCallback(
-      &CdmAdapter::SendSessionReadyInternal, reference_id));
+      &CdmAdapter::SendSessionReadyInternal, session_id));
 }
 
-void CdmAdapter::OnSessionClosed(uint32_t reference_id) {
+void CdmAdapter::OnSessionClosed(uint32_t session_id) {
   PostOnMain(callback_factory_.NewCallback(
-      &CdmAdapter::SendSessionClosedInternal, reference_id));
+      &CdmAdapter::SendSessionClosedInternal, session_id));
 }
 
-void CdmAdapter::OnSessionError(uint32_t reference_id,
+void CdmAdapter::OnSessionError(uint32_t session_id,
                                 cdm::MediaKeyError error_code,
                                 uint32_t system_code) {
   PostOnMain(callback_factory_.NewCallback(
       &CdmAdapter::SendSessionErrorInternal,
-      reference_id,
+      session_id,
       error_code,
       system_code));
 }
 
 void CdmAdapter::SendSessionCreatedInternal(int32_t result,
-                                            uint32_t reference_id,
-                                            const std::string& session_id) {
+                                            uint32_t session_id,
+                                            const std::string& web_session_id) {
   PP_DCHECK(result == PP_OK);
-  pp::ContentDecryptor_Private::SessionCreated(reference_id, session_id);
+  pp::ContentDecryptor_Private::SessionCreated(session_id, web_session_id);
 }
 
 void CdmAdapter::SendSessionMessageInternal(int32_t result,
-                                            uint32_t reference_id,
+                                            uint32_t session_id,
                                             const std::vector<uint8>& message,
                                             const std::string& default_url) {
   PP_DCHECK(result == PP_OK);
@@ -618,28 +619,27 @@ void CdmAdapter::SendSessionMessageInternal(int32_t result,
   }
 
   pp::ContentDecryptor_Private::SessionMessage(
-      reference_id, message_array_buffer, default_url);
+      session_id, message_array_buffer, default_url);
 }
 
-void CdmAdapter::SendSessionReadyInternal(int32_t result,
-                                          uint32_t reference_id) {
+void CdmAdapter::SendSessionReadyInternal(int32_t result, uint32_t session_id) {
   PP_DCHECK(result == PP_OK);
-  pp::ContentDecryptor_Private::SessionReady(reference_id);
+  pp::ContentDecryptor_Private::SessionReady(session_id);
 }
 
 void CdmAdapter::SendSessionClosedInternal(int32_t result,
-                                           uint32_t reference_id) {
+                                           uint32_t session_id) {
   PP_DCHECK(result == PP_OK);
-  pp::ContentDecryptor_Private::SessionClosed(reference_id);
+  pp::ContentDecryptor_Private::SessionClosed(session_id);
 }
 
 void CdmAdapter::SendSessionErrorInternal(int32_t result,
-                                          uint32_t reference_id,
+                                          uint32_t session_id,
                                           cdm::MediaKeyError error_code,
                                           uint32_t system_code) {
   PP_DCHECK(result == PP_OK);
   pp::ContentDecryptor_Private::SessionError(
-      reference_id, error_code, system_code);
+      session_id, error_code, system_code);
 }
 
 void CdmAdapter::DeliverBlock(int32_t result,
diff --git a/media/cdm/ppapi/cdm_adapter.h b/media/cdm/ppapi/cdm_adapter.h
index 57e7524..ec7145d 100644
--- a/media/cdm/ppapi/cdm_adapter.h
+++ b/media/cdm/ppapi/cdm_adapter.h
@@ -53,12 +53,12 @@ class CdmAdapter : public pp::Instance,
   // Note: Results of calls to these methods must be reported through the
   // PPB_ContentDecryptor_Private interface.
   virtual void Initialize(const std::string& key_system) OVERRIDE;
-  virtual void CreateSession(uint32_t reference_id,
+  virtual void CreateSession(uint32_t session_id,
                              const std::string& type,
                              pp::VarArrayBuffer init_data) OVERRIDE;
-  virtual void UpdateSession(uint32_t reference_id,
+  virtual void UpdateSession(uint32_t session_id,
                              pp::VarArrayBuffer response) OVERRIDE;
-  virtual void ReleaseSession(uint32_t reference_id) OVERRIDE;
+  virtual void ReleaseSession(uint32_t session_id) OVERRIDE;
   virtual void Decrypt(
       pp::Buffer_Dev encrypted_buffer,
       const PP_EncryptedBlockInfo& encrypted_block_info) OVERRIDE;
@@ -104,17 +104,17 @@ class CdmAdapter : public pp::Instance,
       cdm::Status decoder_status) OVERRIDE;
 
   // cdm::Host_3 implementation.
-  virtual void OnSessionCreated(uint32_t reference_id,
-                                const char* session_id,
-                                uint32_t session_id_length) OVERRIDE;
-  virtual void OnSessionMessage(uint32_t reference_id,
+  virtual void OnSessionCreated(uint32_t session_id,
+                                const char* web_session_id,
+                                uint32_t web_session_id_length) OVERRIDE;
+  virtual void OnSessionMessage(uint32_t session_id,
                                 const char* message,
                                 uint32_t message_length,
                                 const char* destination_url,
                                 uint32_t destination_url_length) OVERRIDE;
-  virtual void OnSessionReady(uint32_t reference_id) OVERRIDE;
-  virtual void OnSessionClosed(uint32_t reference_id) OVERRIDE;
-  virtual void OnSessionError(uint32_t reference_id,
+  virtual void OnSessionReady(uint32_t session_id) OVERRIDE;
+  virtual void OnSessionClosed(uint32_t session_id) OVERRIDE;
+  virtual void OnSessionError(uint32_t session_id,
                               cdm::MediaKeyError error_code,
                               uint32_t system_code) OVERRIDE;
 
@@ -129,16 +129,16 @@ class CdmAdapter : public pp::Instance,
   // <code>callback_factory_</code> to ensure that calls into
   // <code>PPP_ContentDecryptor_Private</code> are asynchronous.
   void SendSessionCreatedInternal(int32_t result,
-                                  uint32_t reference_id,
-                                  const std::string& session_id);
+                                  uint32_t session_id,
+                                  const std::string& web_session_id);
   void SendSessionMessageInternal(int32_t result,
-                                  uint32_t reference_id,
+                                  uint32_t session_id,
                                   const std::vector<uint8>& message,
                                   const std::string& default_url);
-  void SendSessionReadyInternal(int32_t result, uint32_t reference_id);
-  void SendSessionClosedInternal(int32_t result, uint32_t reference_id);
+  void SendSessionReadyInternal(int32_t result, uint32_t session_id);
+  void SendSessionClosedInternal(int32_t result, uint32_t session_id);
   void SendSessionErrorInternal(int32_t result,
-                                uint32_t reference_id,
+                                uint32_t session_id,
                                 cdm::MediaKeyError error_code,
                                 uint32_t system_code);
 
diff --git a/media/cdm/ppapi/cdm_wrapper.h b/media/cdm/ppapi/cdm_wrapper.h
index 63d8bbf..d827336 100644
--- a/media/cdm/ppapi/cdm_wrapper.h
+++ b/media/cdm/ppapi/cdm_wrapper.h
@@ -52,15 +52,15 @@ class CdmWrapper {
 
   virtual ~CdmWrapper() {};
 
-  virtual void CreateSession(uint32_t reference_id,
+  virtual void CreateSession(uint32_t session_id,
                              const char* type,
                              uint32_t type_size,
                              const uint8_t* init_data,
                              uint32_t init_data_size) = 0;
-  virtual Result UpdateSession(uint32_t reference_id,
+  virtual Result UpdateSession(uint32_t session_id,
                                const uint8_t* response,
                                uint32_t response_size) = 0;
-  virtual Result ReleaseSession(uint32_t reference_id) = 0;
+  virtual Result ReleaseSession(uint32_t session_id) = 0;
   virtual void TimerExpired(void* context) = 0;
   virtual cdm::Status Decrypt(const cdm::InputBuffer& encrypted_buffer,
                               cdm::DecryptedBlock* decrypted_buffer) = 0;
@@ -84,40 +84,40 @@ class CdmWrapper {
 
   // ContentDecryptionModule_1 and ContentDecryptionModule_2 interface methods
   // AddKey() and CancelKeyRequest() (older versions of UpdateSession() and
-  // ReleaseSession(), respectively) pass in the session_id rather than the
-  // reference_id. As well, Host_1 and Host_2 callbacks SendKeyMessage() and
-  // SendKeyError() include the session ID, but the actual callbacks need the
-  // reference ID.
+  // ReleaseSession(), respectively) pass in the web_session_id rather than the
+  // session_id. As well, Host_1 and Host_2 callbacks SendKeyMessage() and
+  // SendKeyError() include the web_session_id, but the actual callbacks need
+  // session_id.
   //
-  // The following functions maintain the reference_id <-> session_id mapping.
+  // The following functions maintain the session_id <-> web_session_id mapping.
   // These can be removed once _1 and _2 interfaces are no longer supported.
 
-  // Determine the corresponding reference_id for |session_id|.
-  virtual uint32_t DetermineReferenceId(const std::string& session_id) = 0;
+  // Determine the corresponding session_id for |web_session_id|.
+  virtual uint32_t LookupSessionId(const std::string& web_session_id) = 0;
 
-  // Determine the corresponding session_id for |reference_id|.
-  virtual const std::string LookupSessionId(uint32_t reference_id) = 0;
+  // Determine the corresponding session_id for |session_id|.
+  virtual const std::string LookupWebSessionId(uint32_t session_id) = 0;
 
+  // Map between session_id and web_session_id.
   // TODO(jrummell): The following can be removed once CDM_1 and CDM_2 are
   // no longer supported.
   typedef std::map<uint32_t, std::string> SessionMap;
-  static const uint32_t kInvalidReferenceId = 0;
-
-  // Map between session_id and reference_id.
   SessionMap session_map_;
 
+  static const uint32_t kInvalidSessionId = 0;
+
   // As the response from PrefixedGenerateKeyRequest() may be synchronous or
   // asynchronous, keep track of the current request during the call to handle
   // synchronous responses or errors. If no response received, add this request
   // to a queue and assume that the subsequent responses come back in the order
   // issued.
   // TODO(jrummell): Remove once all supported CDM host interfaces support
-  // reference_id.
-  uint32_t current_key_request_reference_id_;
-  std::queue<uint32_t> pending_key_request_reference_ids_;
+  // session_id.
+  uint32_t current_key_request_session_id_;
+  std::queue<uint32_t> pending_key_request_session_ids_;
 
  protected:
-  CdmWrapper() : current_key_request_reference_id_(kInvalidReferenceId) {}
+  CdmWrapper() : current_key_request_session_id_(kInvalidSessionId) {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CdmWrapper);
@@ -147,24 +147,23 @@ class CdmWrapperImpl : public CdmWrapper {
     cdm_->Destroy();
   }
 
-  virtual void CreateSession(uint32_t reference_id,
+  virtual void CreateSession(uint32_t session_id,
                              const char* type,
                              uint32_t type_size,
                              const uint8_t* init_data,
                              uint32_t init_data_size) OVERRIDE {
-    cdm_->CreateSession(
-        reference_id, type, type_size, init_data, init_data_size);
+    cdm_->CreateSession(session_id, type, type_size, init_data, init_data_size);
   }
 
-  virtual Result UpdateSession(uint32_t reference_id,
+  virtual Result UpdateSession(uint32_t session_id,
                                const uint8_t* response,
                                uint32_t response_size) OVERRIDE {
-    cdm_->UpdateSession(reference_id, response, response_size);
+    cdm_->UpdateSession(session_id, response, response_size);
     return NO_ACTION;
   }
 
-  virtual Result ReleaseSession(uint32_t reference_id) OVERRIDE {
-    cdm_->ReleaseSession(reference_id);
+  virtual Result ReleaseSession(uint32_t session_id) OVERRIDE {
+    cdm_->ReleaseSession(session_id);
     return NO_ACTION;
   }
 
@@ -218,43 +217,42 @@ class CdmWrapperImpl : public CdmWrapper {
     cdm_->OnQueryOutputProtectionStatus(link_mask, output_protection_mask);
   }
 
-  uint32_t DetermineReferenceId(const std::string& session_id) {
+  uint32_t LookupSessionId(const std::string& web_session_id) {
     for (SessionMap::iterator it = session_map_.begin();
          it != session_map_.end();
          ++it) {
-      if (it->second == session_id)
+      if (it->second == web_session_id)
         return it->first;
     }
 
     // There is no entry in the map; assume it came from the current
     // PrefixedGenerateKeyRequest() call (if possible). If no current request,
     // assume it came from the oldest PrefixedGenerateKeyRequest() call.
-    uint32_t reference_id = current_key_request_reference_id_;
-    if (current_key_request_reference_id_) {
+    uint32_t session_id = current_key_request_session_id_;
+    if (current_key_request_session_id_) {
       // Only 1 response is allowed for the current
       // PrefixedGenerateKeyRequest().
-      current_key_request_reference_id_ = kInvalidReferenceId;
+      current_key_request_session_id_ = kInvalidSessionId;
     } else {
-      PP_DCHECK(!pending_key_request_reference_ids_.empty());
-      reference_id = pending_key_request_reference_ids_.front();
-      pending_key_request_reference_ids_.pop();
+      PP_DCHECK(!pending_key_request_session_ids_.empty());
+      session_id = pending_key_request_session_ids_.front();
+      pending_key_request_session_ids_.pop();
     }
 
     // If this is a valid |session_id|, add it to the list. Otherwise, avoid
     // adding empty string as a mapping to prevent future calls with an empty
-    // string from using the wrong reference_id.
-    if (!session_id.empty()) {
-      PP_DCHECK(session_map_.find(reference_id) == session_map_.end());
-      PP_DCHECK(!session_id.empty());
-      session_map_[reference_id] = session_id;
+    // string from using the wrong session_id.
+    if (!web_session_id.empty()) {
+      PP_DCHECK(session_map_.find(session_id) == session_map_.end());
+      session_map_[session_id] = web_session_id;
     }
 
-    return reference_id;
+    return session_id;
   }
 
-  const std::string LookupSessionId(uint32_t reference_id) {
+  const std::string LookupWebSessionId(uint32_t session_id) {
     // Session may not exist if error happens during CreateSession().
-    SessionMap::iterator it = session_map_.find(reference_id);
+    SessionMap::iterator it = session_map_.find(session_id);
     return (it != session_map_.end()) ? it->second : std::string();
   }
 
@@ -276,14 +274,14 @@ class CdmWrapperImpl : public CdmWrapper {
 template <class CdmInterface>
 void PrefixedGenerateKeyRequest(CdmWrapper* wrapper,
                                 CdmInterface* cdm,
-                                uint32_t reference_id,
+                                uint32_t session_id,
                                 const char* type,
                                 uint32_t type_size,
                                 const uint8_t* init_data,
                                 uint32_t init_data_size) {
   // As it is possible for CDMs to reply synchronously during the call to
-  // GenerateKeyRequest(), keep track of |reference_id|.
-  wrapper->current_key_request_reference_id_ = reference_id;
+  // GenerateKeyRequest(), keep track of |session_id|.
+  wrapper->current_key_request_session_id_ = session_id;
 
   cdm::Status status =
       cdm->GenerateKeyRequest(type, type_size, init_data, init_data_size);
@@ -291,42 +289,41 @@ void PrefixedGenerateKeyRequest(CdmWrapper* wrapper,
   if (status != cdm::kSuccess) {
     // If GenerateKeyRequest() failed, no subsequent asynchronous replies
     // will be sent. Verify that a response was sent synchronously.
-    PP_DCHECK(wrapper->current_key_request_reference_id_ ==
-              CdmWrapper::kInvalidReferenceId);
-    wrapper->current_key_request_reference_id_ =
-        CdmWrapper::kInvalidReferenceId;
+    PP_DCHECK(wrapper->current_key_request_session_id_ ==
+              CdmWrapper::kInvalidSessionId);
+    wrapper->current_key_request_session_id_ = CdmWrapper::kInvalidSessionId;
     return;
   }
 
-  if (wrapper->current_key_request_reference_id_) {
+  if (wrapper->current_key_request_session_id_) {
     // If this request is still pending (SendKeyMessage() or SendKeyError()
-    // not called synchronously), add |reference_id| to the end of the queue.
+    // not called synchronously), add |session_id| to the end of the queue.
     // Without CDM support, it is impossible to match SendKeyMessage()
-    // (or SendKeyError()) responses to the |reference_id|. Doing the best
+    // (or SendKeyError()) responses to the |session_id|. Doing the best
     // we can by keeping track of this in a queue, and assuming the responses
     // come back in order.
-    wrapper->pending_key_request_reference_ids_.push(reference_id);
-    wrapper->current_key_request_reference_id_ =
-        CdmWrapper::kInvalidReferenceId;
+    wrapper->pending_key_request_session_ids_.push(session_id);
+    wrapper->current_key_request_session_id_ = CdmWrapper::kInvalidSessionId;
   }
 }
 
 template <class CdmInterface>
 CdmWrapper::Result PrefixedAddKey(CdmWrapper* wrapper,
                                   CdmInterface* cdm,
-                                  uint32_t reference_id,
+                                  uint32_t session_id,
                                   const uint8_t* response,
                                   uint32_t response_size) {
-  const std::string session_id = wrapper->LookupSessionId(reference_id);
-  if (session_id.empty()) {
+  const std::string web_session_id = wrapper->LookupWebSessionId(session_id);
+  if (web_session_id.empty()) {
     // Possible if UpdateSession() called before CreateSession().
     return CdmWrapper::CALL_KEY_ERROR;
   }
 
   // CDM_1 and CDM_2 accept initdata, which is no longer needed.
   // In it's place pass in NULL.
-  cdm::Status status = cdm->AddKey(
-      session_id.data(), session_id.size(), response, response_size, NULL, 0);
+  cdm::Status status = cdm->AddKey(web_session_id.data(), web_session_id.size(),
+                                   response, response_size,
+                                   NULL, 0);
   PP_DCHECK(status == cdm::kSuccess || status == cdm::kSessionError);
   if (status != cdm::kSuccess) {
     // Some CDMs using Host_1/2 don't call keyerror, so send one.
@@ -339,16 +336,16 @@ CdmWrapper::Result PrefixedAddKey(CdmWrapper* wrapper,
 template <class CdmInterface>
 CdmWrapper::Result PrefixedCancelKeyRequest(CdmWrapper* wrapper,
                                             CdmInterface* cdm,
-                                            uint32_t reference_id) {
-  const std::string session_id = wrapper->LookupSessionId(reference_id);
-  if (session_id.empty()) {
+                                            uint32_t session_id) {
+  const std::string web_session_id = wrapper->LookupWebSessionId(session_id);
+  if (web_session_id.empty()) {
     // Possible if ReleaseSession() called before CreateSession().
     return CdmWrapper::CALL_KEY_ERROR;
   }
 
-  wrapper->session_map_.erase(reference_id);
+  wrapper->session_map_.erase(session_id);
   cdm::Status status =
-      cdm->CancelKeyRequest(session_id.data(), session_id.size());
+      cdm->CancelKeyRequest(web_session_id.data(), web_session_id.size());
 
   PP_DCHECK(status == cdm::kSuccess || status == cdm::kSessionError);
   if (status != cdm::kSuccess) {
@@ -363,27 +360,27 @@ CdmWrapper::Result PrefixedCancelKeyRequest(CdmWrapper* wrapper,
 
 template <>
 void CdmWrapperImpl<cdm::ContentDecryptionModule_1>::CreateSession(
-    uint32_t reference_id,
+    uint32_t session_id,
     const char* type,
     uint32_t type_size,
     const uint8_t* init_data,
     uint32_t init_data_size) {
   PrefixedGenerateKeyRequest(
-      this, cdm_, reference_id, type, type_size, init_data, init_data_size);
+      this, cdm_, session_id, type, type_size, init_data, init_data_size);
 }
 
 template <>
 CdmWrapper::Result CdmWrapperImpl<
-    cdm::ContentDecryptionModule_1>::UpdateSession(uint32_t reference_id,
+    cdm::ContentDecryptionModule_1>::UpdateSession(uint32_t session_id,
                                                    const uint8_t* response,
                                                    uint32_t response_size) {
-  return PrefixedAddKey(this, cdm_, reference_id, response, response_size);
+  return PrefixedAddKey(this, cdm_, session_id, response, response_size);
 }
 
 template <>
 CdmWrapper::Result CdmWrapperImpl<
-    cdm::ContentDecryptionModule_1>::ReleaseSession(uint32_t reference_id) {
-  return PrefixedCancelKeyRequest(this, cdm_, reference_id);
+    cdm::ContentDecryptionModule_1>::ReleaseSession(uint32_t session_id) {
+  return PrefixedCancelKeyRequest(this, cdm_, session_id);
 }
 
 template <> void CdmWrapperImpl<cdm::ContentDecryptionModule_1>::
@@ -416,27 +413,27 @@ template <> cdm::Status CdmWrapperImpl<cdm::ContentDecryptionModule_1>::
 
 template <>
 void CdmWrapperImpl<cdm::ContentDecryptionModule_2>::CreateSession(
-    uint32_t reference_id,
+    uint32_t session_id,
     const char* type,
     uint32_t type_size,
     const uint8_t* init_data,
     uint32_t init_data_size) {
   PrefixedGenerateKeyRequest(
-      this, cdm_, reference_id, type, type_size, init_data, init_data_size);
+      this, cdm_, session_id, type, type_size, init_data, init_data_size);
 }
 
 template <>
 CdmWrapper::Result CdmWrapperImpl<
-    cdm::ContentDecryptionModule_2>::UpdateSession(uint32_t reference_id,
+    cdm::ContentDecryptionModule_2>::UpdateSession(uint32_t session_id,
                                                    const uint8_t* response,
                                                    uint32_t response_size) {
-  return PrefixedAddKey(this, cdm_, reference_id, response, response_size);
+  return PrefixedAddKey(this, cdm_, session_id, response, response_size);
 }
 
 template <>
 CdmWrapper::Result CdmWrapperImpl<
-    cdm::ContentDecryptionModule_2>::ReleaseSession(uint32_t reference_id) {
-  return PrefixedCancelKeyRequest(this, cdm_, reference_id);
+    cdm::ContentDecryptionModule_2>::ReleaseSession(uint32_t session_id) {
+  return PrefixedCancelKeyRequest(this, cdm_, session_id);
 }
 
 CdmWrapper* CdmWrapper::Create(const char* key_system,
diff --git a/media/cdm/ppapi/clear_key_cdm.cc b/media/cdm/ppapi/clear_key_cdm.cc
index 3fc10e1..6d3a68c 100644
--- a/media/cdm/ppapi/clear_key_cdm.cc
+++ b/media/cdm/ppapi/clear_key_cdm.cc
@@ -159,9 +159,9 @@ const char* GetCdmVersion() {
 namespace media {
 
 // Since all the calls to AesDecryptor are synchronous, pass a dummy value for
-// reference_id that is never exposed outside this class.
+// session_id that is never exposed outside this class.
 // TODO(jrummell): Remove usage of this when the CDM interface is updated
-// to use reference_id.
+// to use session_id.
 
 ClearKeyCdm::Client::Client()
     : status_(kNone), error_code_(MediaKeys::kUnknownError), system_code_(0) {}
@@ -170,20 +170,20 @@ ClearKeyCdm::Client::~Client() {}
 
 void ClearKeyCdm::Client::Reset() {
   status_ = kNone;
-  session_id_.clear();
+  web_session_id_.clear();
   message_.clear();
   destination_url_.clear();
   error_code_ = MediaKeys::kUnknownError;
   system_code_ = 0;
 }
 
-void ClearKeyCdm::Client::OnSessionCreated(uint32 reference_id,
-                                           const std::string& session_id) {
+void ClearKeyCdm::Client::OnSessionCreated(uint32 session_id,
+                                           const std::string& web_session_id) {
   status_ = static_cast<Status>(status_ | kCreated);
-  session_id_ = session_id;
+  web_session_id_ = web_session_id;
 }
 
-void ClearKeyCdm::Client::OnSessionMessage(uint32 reference_id,
+void ClearKeyCdm::Client::OnSessionMessage(uint32 session_id,
                                            const std::vector<uint8>& message,
                                            const std::string& destination_url) {
   status_ = static_cast<Status>(status_ | kMessage);
@@ -191,15 +191,15 @@ void ClearKeyCdm::Client::OnSessionMessage(uint32 reference_id,
   destination_url_ = destination_url;
 }
 
-void ClearKeyCdm::Client::OnSessionReady(uint32 reference_id) {
+void ClearKeyCdm::Client::OnSessionReady(uint32 session_id) {
   status_ = static_cast<Status>(status_ | kReady);
 }
 
-void ClearKeyCdm::Client::OnSessionClosed(uint32 reference_id) {
+void ClearKeyCdm::Client::OnSessionClosed(uint32 session_id) {
   status_ = static_cast<Status>(status_ | kClosed);
 }
 
-void ClearKeyCdm::Client::OnSessionError(uint32 reference_id,
+void ClearKeyCdm::Client::OnSessionError(uint32 session_id,
                                          media::MediaKeys::KeyError error_code,
                                          int system_code) {
   status_ = static_cast<Status>(status_ | kError);
@@ -236,27 +236,27 @@ cdm::Status ClearKeyCdm::GenerateKeyRequest(const char* type,
   DVLOG(1) << "GenerateKeyRequest()";
   base::AutoLock auto_lock(client_lock_);
   ScopedResetter<Client> auto_resetter(&client_);
-  decryptor_.CreateSession(MediaKeys::kInvalidReferenceId,
+  decryptor_.CreateSession(MediaKeys::kInvalidSessionId,
                            std::string(type, type_size),
                            init_data, init_data_size);
 
   if (client_.status() != (Client::kMessage | Client::kCreated)) {
     // Use values returned to client if possible.
-    host_->SendKeyError(client_.session_id().data(),
-                        client_.session_id().size(),
+    host_->SendKeyError(client_.web_session_id().data(),
+                        client_.web_session_id().size(),
                         static_cast<cdm::MediaKeyError>(client_.error_code()),
                         client_.system_code());
     return cdm::kSessionError;
   }
 
   host_->SendKeyMessage(
-      client_.session_id().data(), client_.session_id().size(),
+      client_.web_session_id().data(), client_.web_session_id().size(),
       reinterpret_cast<const char*>(&client_.message()[0]),
       client_.message().size(),
       client_.destination_url().data(), client_.destination_url().size());
 
   // Only save the latest session ID for heartbeat messages.
-  heartbeat_session_id_ = client_.session_id();
+  heartbeat_session_id_ = client_.web_session_id();
 
   return cdm::kSuccess;
 }
@@ -271,7 +271,7 @@ cdm::Status ClearKeyCdm::AddKey(const char* session_id,
   DCHECK(!key_id && !key_id_size);
   base::AutoLock auto_lock(client_lock_);
   ScopedResetter<Client> auto_resetter(&client_);
-  decryptor_.UpdateSession(MediaKeys::kInvalidReferenceId, key, key_size);
+  decryptor_.UpdateSession(MediaKeys::kInvalidSessionId, key, key_size);
 
   if (client_.status() != Client::kReady) {
     host_->SendKeyError(session_id, session_id_size,
@@ -293,7 +293,7 @@ cdm::Status ClearKeyCdm::CancelKeyRequest(const char* session_id,
   DVLOG(1) << "CancelKeyRequest()";
   base::AutoLock auto_lock(client_lock_);
   ScopedResetter<Client> auto_resetter(&client_);
-  decryptor_.ReleaseSession(MediaKeys::kInvalidReferenceId);
+  decryptor_.ReleaseSession(MediaKeys::kInvalidSessionId);
 
   // No message normally sent by Release(), but if an error occurred,
   // report it as a failure.
diff --git a/media/cdm/ppapi/clear_key_cdm.h b/media/cdm/ppapi/clear_key_cdm.h
index 4c5cb34..0ec18a1 100644
--- a/media/cdm/ppapi/clear_key_cdm.h
+++ b/media/cdm/ppapi/clear_key_cdm.h
@@ -72,7 +72,7 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
   class Client {
    public:
     // TODO(jrummell): Remove bitmask and rename kNone to kInvalid once CDM
-    // interface supports reference_id passing completely.
+    // interface supports session_id passing completely.
     enum Status {
       kNone = 0,
       kCreated = 1 << 0,
@@ -86,7 +86,7 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
     virtual ~Client();
 
     Status status() { return status_; }
-    const std::string& session_id() { return session_id_; }
+    const std::string& web_session_id() { return web_session_id_; }
     const std::vector<uint8>& message() { return message_; }
     const std::string& destination_url() { return destination_url_; }
     MediaKeys::KeyError error_code() { return error_code_; }
@@ -95,19 +95,19 @@ class ClearKeyCdm : public ClearKeyCdmInterface {
     // Resets the Client to a clean state.
     void Reset();
 
-    void OnSessionCreated(uint32 reference_id, const std::string& session_id);
-    void OnSessionMessage(uint32 reference_id,
+    void OnSessionCreated(uint32 session_id, const std::string& web_session_id);
+    void OnSessionMessage(uint32 session_id,
                           const std::vector<uint8>& message,
                           const std::string& destination_url);
-    void OnSessionReady(uint32 reference_id);
-    void OnSessionClosed(uint32 reference_id);
-    void OnSessionError(uint32 reference_id,
+    void OnSessionReady(uint32 session_id);
+    void OnSessionClosed(uint32 session_id);
+    void OnSessionError(uint32 session_id,
                         MediaKeys::KeyError error_code,
                         int system_code);
 
    private:
     Status status_;
-    std::string session_id_;
+    std::string web_session_id_;
     std::vector<uint8> message_;
     std::string destination_url_;
     MediaKeys::KeyError error_code_;