Update WebContentDecryptionModuleSessionImpl to the latest EME spec.

content/renderer/media/webcontentdecryptionmodulesession_impl.cc

Index: content/renderer/media/webcontentdecryptionmodulesession_impl.cc
diff --git a/content/renderer/media/webcontentdecryptionmodulesession_impl.cc b/content/renderer/media/webcontentdecryptionmodulesession_impl.cc
index bc74d35dc6adaa487319d0c284ec6d6ca721deff..93cab724256b85675df96502bc0e41af4eb1eb7e 100644
--- a/content/renderer/media/webcontentdecryptionmodulesession_impl.cc
+++ b/content/renderer/media/webcontentdecryptionmodulesession_impl.cc
@@ -31,7 +31,7 @@ blink::WebString WebContentDecryptionModuleSessionImpl::sessionId() const {
   return web_session_id_;
 }
 
-void WebContentDecryptionModuleSessionImpl::generateKeyRequest(
+void WebContentDecryptionModuleSessionImpl::initializeNewSession(
     const blink::WebString& mime_type,
     const uint8* init_data, size_t init_data_length) {
   // TODO(ddorwin): Guard against this in supported types check and remove this.
@@ -46,16 +46,26 @@ void WebContentDecryptionModuleSessionImpl::generateKeyRequest(
       session_id_, UTF16ToASCII(mime_type), init_data, init_data_length);
 }
 
+void WebContentDecryptionModuleSessionImpl::generateKeyRequest(
+    const blink::WebString& mime_type,
+    const uint8* init_data, size_t init_data_length) {
+  initializeNewSession(mime_type, init_data, init_data_length);
+}
+
 void WebContentDecryptionModuleSessionImpl::update(const uint8* response,
                                                    size_t response_length) {
   DCHECK(response);
   media_keys_->UpdateSession(session_id_, response, response_length);
 }
 
-void WebContentDecryptionModuleSessionImpl::close() {
+void WebContentDecryptionModuleSessionImpl::release() {
   media_keys_->ReleaseSession(session_id_);
 }
 
+void WebContentDecryptionModuleSessionImpl::close() {
+  release();
+}
+
 void WebContentDecryptionModuleSessionImpl::OnSessionCreated(
     const std::string& web_session_id) {
   // Due to heartbeat messages, OnSessionCreated() can get called multiple