Update WebContentDecryptionModuleSessionImpl to the latest EME spec.

- generateKeyRequest() -> initializeNewSession()
- close() -> release()

This change is made to match the latest EME spec. The deprecated methods
will be dropped after Blink is updated. The Blink side change is at:
https://codereview.chromium.org/111043004/

BUG=224786

Review URL: https://codereview.chromium.org/101693009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244029 0039d316-1c4b-4281-b951-d872f2087c98

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

content/renderer/media/webcontentdecryptionmodulesession_impl.h

@@ -34,10 +34,17 @@ class WebContentDecryptionModuleSessionImpl
 
   // blink::WebContentDecryptionModuleSession implementation.
   virtual blink::WebString sessionId() const;
+  virtual void initializeNewSession(const blink::WebString& mime_type,
+                                    const uint8* init_data,
+                                    size_t init_data_length);
+  virtual void update(const uint8* response, size_t response_length);
+  virtual void release();
+
+  // TODO(xhwang): Drop generateKeyRequest() and close() after blink side is
+  // updated.
   virtual void generateKeyRequest(const blink::WebString& mime_type,
                                   const uint8* init_data,
                                   size_t init_data_length);
-  virtual void update(const uint8* response, size_t response_length);
   virtual void close();
 
   // Callbacks.