Add a deprecation warning for document.clear()

Source/core/page/UseCounter.cpp

Index: Source/core/page/UseCounter.cpp
diff --git a/Source/core/page/UseCounter.cpp b/Source/core/page/UseCounter.cpp
index dbb3ab6df53579dfff2bcb7ff25a2dedfaabba81..9692b62d56a3b290ac06e66976c53676c5f59abd 100644
--- a/Source/core/page/UseCounter.cpp
+++ b/Source/core/page/UseCounter.cpp
@@ -145,6 +145,9 @@ String UseCounter::deprecationMessage(Feature feature)
     case WebAudioLooping:
         return "AudioBufferSourceNode 'looping' attribute is deprecated.  Use 'loop' instead.";
 
+    case DocumentClear:
+        return "document.clear() is deprecated.";

[abarth-chromium, 2013/05/07 20:24:46]

Is there an alternative folks should use instead?

[esprehn, 2013/05/07 20:25:53]

Nope, this method is a noop.

+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();