[counters] Add UseCounters for 'f() = 0' syntax

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index f75ff4fb86476f847f88e9ffad9e465fed95e604..d0c0955952baeace29176a45d61d5ed84c479bc1 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -6488,6 +6488,8 @@ class V8_EXPORT Isolate {
     kLegacyDateParser = 33,
     kDefineGetterOrSetterWouldThrow = 34,
     kFunctionConstructorReturnedUndefined = 35,
+    kAssigmentExpressionLHSIsCallInNonstrict = 36,

[Dan Ehrenberg, 2016/12/23 07:56:52]

Bikeshed: We use 'sloppy' all over the place to express non-strict; I think it'd
be clearer to use that here too.

[bakkot1, 2016/12/23 09:41:53]

Done.

+    kAssigmentExpressionLHSIsCallInStrict = 37,
 
     // If you add new values here, you'll also need to update Chromium's:
     // UseCounter.h, V8PerIsolateData.cpp, histograms.xml