Remove prefixed EME.

third_party/WebKit/Source/core/frame/Deprecation.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/Deprecation.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
@@ skipping 229 matching lines @@
 
     case UseCounter::PrefixedAudioContext:
         return replacedBy("'webkitAudioContext'", "'AudioContext'");
 
     case UseCounter::PrefixedOfflineAudioContext:
         return replacedBy("'webkitOfflineAudioContext'", "'OfflineAudioContext'");
 
     case UseCounter::RangeExpand:
         return replacedBy("'Range.expand()'", "'Selection.modify()'");
 
-    case UseCounter::PrefixedMediaAddKey:
-    case UseCounter::PrefixedMediaGenerateKeyRequest:
-    case UseCounter::PrefixedMediaCancelKeyRequest:
-        return "The prefixed Encrypted Media Extensions APIs are deprecated. Please use 'navigator.requestMediaKeySystemAccess()' instead.";
-
-    case UseCounter::CanPlayTypeKeySystem:
-        return replacedBy("canPlayType()'s 'keySystem' parameter", "'navigator.requestMediaKeySystemAccess()'");
-
     // Powerful features on insecure origins (https://goo.gl/rStTGz)
     case UseCounter::DeviceMotionInsecureOrigin:
         return "The devicemotion event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";
 
     case UseCounter::DeviceOrientationInsecureOrigin:
         return "The deviceorientation event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";
 
     case UseCounter::DeviceOrientationAbsoluteInsecureOrigin:
         return "The deviceorientationabsolute event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";
 
@@ skipping 77 matching lines @@
     case UseCounter::BorderImageWithBorderStyleNone:
         return "Elements using the 'border-image' CSS property with no 'border-style' set should have no border, but currently do. Setting 'border-style' will be required in M51, around June 2016. See https://www.chromestatus.com/features/5542503914668032 for more details.";
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 } // namespace blink