Implement unprefixed EME APIs that match the latest draft

Source/platform/exported/WebContentDecryptionModuleSession.cpp

Index: Source/platform/exported/WebContentDecryptionModuleSession.cpp
diff --git a/Source/platform/exported/WebContentDecryptionModuleSession.cpp b/Source/platform/exported/WebContentDecryptionModuleSession.cpp
index 012527442aadf8c62684872713046fb775ae7129..762f8c2af0d0e8b7d22c47fe798c845745cf3b80 100644
--- a/Source/platform/exported/WebContentDecryptionModuleSession.cpp
+++ b/Source/platform/exported/WebContentDecryptionModuleSession.cpp
@@ -48,11 +48,26 @@ void WebContentDecryptionModuleSession::initializeNewSession(const WebString& in
     ReportError(result);
 }
 
+void WebContentDecryptionModuleSession::load(const WebString& sessionId, WebContentDecryptionModuleResult result)
+{
+    ReportError(result);
+}
+
 void WebContentDecryptionModuleSession::update(const unsigned char* response, size_t responseLength, WebContentDecryptionModuleResult result)
 {
     ReportError(result);
 }
 
+void WebContentDecryptionModuleSession::close(WebContentDecryptionModuleResult result)
+{
+    ReportError(result);
+}
+
+void WebContentDecryptionModuleSession::remove(WebContentDecryptionModuleResult result)
+{
+    ReportError(result);
+}
+
 void WebContentDecryptionModuleSession::release(WebContentDecryptionModuleResult result)
 {
     ReportError(result);