Thread up two new V8 UseCounters for ES2015 RegExp compat

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

Index: third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
index 5d2320f0dd79ab44dc8ef79436aa7ac61e4a7b79..50e98e4a7ca93b76a6b06286d1dc1c4fb076e520 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
@@ -78,6 +78,12 @@ static void useCounterCallback(v8::Isolate* isolate, v8::Isolate::UseCounterFeat
     case v8::Isolate::kStrongMode:
         blinkFeature = UseCounter::V8StrongMode;
         break;
+    case v8::Isolate::kRegExpPrototypeStickyGetter:
+        blinkFeature = UseCounter::V8RegExpPrototypeStickyGetter;
+        break;
+    case v8::Isolate::kRegExpPrototypeToString:
+        blinkFeature = UseCounter::V8RegExpPrototypeToString;
+        break;
     default:
         // This can happen if V8 has added counters that this version of Blink
         // does not know about. It's harmless.