Deprecate document.defaultCharset (to be removed in M50)

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

Index: third_party/WebKit/Source/core/frame/UseCounter.cpp
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.cpp b/third_party/WebKit/Source/core/frame/UseCounter.cpp
index b9fabde465cfc73d1936f2a7db5df393f2892717..52f27ad6e7a2efe0c00b698073520687c5c70ff5 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.cpp
+++ b/third_party/WebKit/Source/core/frame/UseCounter.cpp
@@ -961,6 +961,9 @@ String UseCounter::deprecationMessage(Feature feature)
     case CSSXGetComputedStyleQueries:
         return replacedWillBeRemoved("'getComputedStyle(e).cssXx' (except .cssFloat)", "'getComputedStyle(e).xx'", 50, "5006796888473600");
 
+    case DocumentDefaultCharset:
+        return willBeRemoved("'Document.defaultCharset'", 50, "6217124578066432");
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();