Remove MediaStream label, ended attributes and stop() method

Source/core/frame/UseCounter.cpp

Index: Source/core/frame/UseCounter.cpp
diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
index 912beb59c36aa7b0b49150f1d34a7274674da17a..47f0f9784f6c093c4a48acc139740cd334417d2e 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -920,16 +920,6 @@ String UseCounter::deprecationMessage(Feature feature)
     case SVGSMILElementInDocument:
     case SVGSMILAnimationInImageRegardlessOfCache:
         return "SVG's SMIL animations (<animate>, <set>, etc.) are deprecated and will be removed. Please use CSS animations or Web animations instead.";
-
-    case MediaStreamLabel:
-        return "'MediaStream.label' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.id' instead.";
-
-    case MediaStreamStop:
-        return "'MediaStream.stop()' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.active' instead.";
-
-    case MediaStreamEnded:
-        return "'MediaStream.ended' is deprecated and will be removed in M47, around November 2015. Please use 'MediaStream.active' instead.";
-
     case PrefixedPerformanceClearResourceTimings:
         return replacedBy("Performance.webkitClearResourceTimings", "Performance.clearResourceTimings");