Add UseCounters for various RegExp compatibility issues

src/js/regexp.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
@@ skipping 626 matching lines @@
     return %_SubString(LAST_SUBJECT(RegExpLastMatchInfo), matchStart, matchEnd);
   };
 }
 
 
 // ES6 21.2.5.4.
 function RegExpGetGlobal() {
   if (!IS_REGEXP(this)) {
     // TODO(littledan): Remove this RegExp compat workaround
     if (this === GlobalRegExpPrototype) {
+      %IncrementUseCounter(kRegExpPrototypeOldFlagGetter);
       return UNDEFINED;
     }
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.global");
   }
   return !!REGEXP_GLOBAL(this);
 }
 %FunctionSetName(RegExpGetGlobal, "RegExp.prototype.global");
 %SetNativeFlag(RegExpGetGlobal);
 
 
 // ES6 21.2.5.5.
 function RegExpGetIgnoreCase() {
   if (!IS_REGEXP(this)) {
     // TODO(littledan): Remove this RegExp compat workaround
     if (this === GlobalRegExpPrototype) {
+      %IncrementUseCounter(kRegExpPrototypeOldFlagGetter);
       return UNDEFINED;
     }
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.ignoreCase");
   }
   return !!REGEXP_IGNORE_CASE(this);
 }
 %FunctionSetName(RegExpGetIgnoreCase, "RegExp.prototype.ignoreCase");
 %SetNativeFlag(RegExpGetIgnoreCase);
 
 
 // ES6 21.2.5.7.
 function RegExpGetMultiline() {
   if (!IS_REGEXP(this)) {
     // TODO(littledan): Remove this RegExp compat workaround
     if (this === GlobalRegExpPrototype) {
+      %IncrementUseCounter(kRegExpPrototypeOldFlagGetter);
       return UNDEFINED;
     }
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.multiline");
   }
   return !!REGEXP_MULTILINE(this);
 }
 %FunctionSetName(RegExpGetMultiline, "RegExp.prototype.multiline");
 %SetNativeFlag(RegExpGetMultiline);
 
 
 // ES6 21.2.5.10.
 function RegExpGetSource() {
   if (!IS_REGEXP(this)) {
     // TODO(littledan): Remove this RegExp compat workaround
     if (this === GlobalRegExpPrototype) {
+      %IncrementUseCounter(kRegExpPrototypeSourceGetter);
       return UNDEFINED;
     }
     throw MakeTypeError(kRegExpNonRegExp, "RegExp.prototype.source");
   }
   return REGEXP_SOURCE(this);
 }
 %FunctionSetName(RegExpGetSource, "RegExp.prototype.source");
 %SetNativeFlag(RegExpGetSource);
 
 // -------------------------------------------------------------------
@@ skipping 70 matching lines @@
 // Exports
 
 utils.Export(function(to) {
   to.RegExpExec = DoRegExpExec;
   to.RegExpExecNoTests = RegExpExecNoTests;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
   to.RegExpTest = RegExpTest;
 });
 
 })