Implement unprefixed EME APIs that match the latest draft

public/platform/WebContentDecryptionModule.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebContentDecryptionModule_h
 #define WebContentDecryptionModule_h
 
+#include "public/platform/WebContentDecryptionModuleResult.h"
 #include "public/platform/WebContentDecryptionModuleSession.h"
 
 namespace blink {
 
 class BLINK_PLATFORM_EXPORT WebContentDecryptionModule {
 public:
     virtual ~WebContentDecryptionModule();
 
     // Must return non-null.
     virtual WebContentDecryptionModuleSession* createSession() = 0;
+
+    virtual void setServerCertificate(const unsigned char* certificate, size_t certificateLength, WebContentDecryptionModuleResult) = 0;
 };
 
 } // namespace blink
 
 #endif // WebContentDecryptionModule_h