Web Audio: when media playback requires a user gesture, apply rule to cross origin iframes.

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

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index afb817e92c452828fe4a708e3078c9ff7dc0aacf..4ca31fec0a86c15698df41cc5d0e12390038e73d 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -381,9 +381,6 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature)
     case UseCounter::NavigatorPointerEnabled:
         return "Navigator.pointerEnabled is a non-standard API added for experiments only. It will be removed in near future.";
 
-    case UseCounter::WebAudioAutoplayCrossOriginIframe:
-        return willBeRemoved("Web Audio autoplay (without user gesture) from cross origin iframes", 55, "6406908126691328");
-
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();