add UseCounters for NonOctalDecimalIntegerLiteral in strict mode

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 9a881f2383ce6e6107c7c3da77f234113e62749f..3c208e5b36ff6b745d7122b579ed8933142b299c 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5609,9 +5609,10 @@ class V8_EXPORT Isolate {
     kLegacyFunctionDeclaration = 29,
     kRegExpPrototypeSourceGetter = 30,
     kRegExpPrototypeOldFlagGetter = 31,
+    kDecimalWithLeadingZeroInStrictMode = 32,
 
-    // If you add new values here, you'll also need to update V8Initializer.cpp
-    // in Chromium.
+    // If you add new values here, you'll also need to update UseCounter.h
+    // and V8PerIsolateData.cpp in Chromium.

[Dan Ehrenberg, 2016/05/11 00:36:57]

...and histogram.xml (see https://codereview.chromium.org/1578143002 for a full
example).

     kUseCounterFeatureCount  // This enum value must be last.
   };