Further ES2015 RegExp spec compliance fixes

test/cctest/test-regexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1931 matching lines @@
       "}"
       "exception");
   CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
   CHECK_EQ(0, use_counts[v8::Isolate::kRegExpPrototypeToString]);
   CHECK(resultStickyError->IsObject());
 
   // RegExp.prototype.toString() returns '/(?:)/' as a compatibility fix;
   // a UseCounter is incremented to track it.
   v8::Local<v8::Value> resultToString =
       CompileRun("RegExp.prototype.toString().length");
-  CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
+  CHECK_EQ(2, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
   CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeToString]);
   CHECK(resultToString->IsInt32());
   CHECK_EQ(6,
            resultToString->Int32Value(isolate->GetCurrentContext()).FromJust());
 
   // .toString() works on normal RegExps
   v8::Local<v8::Value> resultReToString = CompileRun("/a/.toString().length");
-  CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
+  CHECK_EQ(2, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
   CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeToString]);
   CHECK(resultReToString->IsInt32());
   CHECK_EQ(
       3, resultReToString->Int32Value(isolate->GetCurrentContext()).FromJust());
 
   // .toString() throws on non-RegExps that aren't RegExp.prototype
   v8::Local<v8::Value> resultToStringError = CompileRun(
       "var exception;"
       "try { RegExp.prototype.toString.call(null) }"
       "catch (e) { exception = e; }"
       "exception");
-  CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
+  CHECK_EQ(2, use_counts[v8::Isolate::kRegExpPrototypeStickyGetter]);
   CHECK_EQ(1, use_counts[v8::Isolate::kRegExpPrototypeToString]);
   CHECK(resultToStringError->IsObject());
 }