Make DOMImplementation.hasFeature() always return true.

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 7cce5a0ef4b188f6b95262f9673cede6dd469b05..f38189d25bdb4c88f3c16afc533ca9626a997277 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -830,9 +830,6 @@ String UseCounter::deprecationMessage(Feature feature)
     case XMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload:
         return "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/.";
 
-    case DOMImplementationHasFeatureReturnFalse:
-        return "'DOMImplementation.hasFeature()' returning false is deprecated. Please do not use it, as per DOM it should always return true (https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature).";
-
     case GetMatchedCSSRules:
         return "'getMatchedCSSRules()' is deprecated. For more help, check https://code.google.com/p/chromium/issues/detail?id=437569#c2";