Properly thread language mode to compilation cache

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 0ff8d21d5c8fc5bcd96d0e7de153e060b0d6254c..31d6e3e00c2cc355bc8b2caaface11a6989d55bd 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1366,14 +1366,7 @@ bool Genesis::CompileExperimentalBuiltin(Isolate* isolate, int index) {
       isolate, source_code,
       factory->NewStringFromAscii(ExperimentalNatives::GetScriptSource(index)),
       false);
-
-  // TODO(rossberg): The natives do not yet obey strong mode rules
-  // (for example, some macros use '==').
-  bool use_strong = FLAG_use_strong;
-  FLAG_use_strong = false;
-  bool result = CompileNative(isolate, name, source_code);
-  FLAG_use_strong = use_strong;
-  return result;
+  return CompileNative(isolate, name, source_code);
 }