Add UseCounter for Date.parse's legacy parse heuristics.

third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 173 matching lines @@
         break;
     case v8::Isolate::kRegExpPrototypeSourceGetter:
         blinkFeature = UseCounter::V8RegExpPrototypeSourceGetter;
         break;
     case v8::Isolate::kRegExpPrototypeOldFlagGetter:
         blinkFeature = UseCounter::V8RegExpPrototypeOldFlagGetter;
         break;
     case v8::Isolate::kDecimalWithLeadingZeroInStrictMode:
         blinkFeature = UseCounter::V8DecimalWithLeadingZeroInStrictMode;
         break;
+    case v8::Isolate::kLegacyDateParser:
+        blinkFeature = UseCounter::V8LegacyDateParser;
+        break;
     default:
         // This can happen if V8 has added counters that this version of Blink
         // does not know about. It's harmless.
         return;
     }
     if (deprecated)
         Deprecation::countDeprecation(currentExecutionContext(isolate), blinkFeature);
     else
         UseCounter::count(currentExecutionContext(isolate), blinkFeature);
 }
@@ skipping 171 matching lines @@
 
 void V8PerIsolateData::addActiveScriptWrappable(ActiveScriptWrappable* wrappable)
 {
     if (!m_activeScriptWrappables)
         m_activeScriptWrappables = new ActiveScriptWrappableSet();
 
     m_activeScriptWrappables->add(wrappable);
 }
 
 } // namespace blink