Port r9543 to the 3.4 branch.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 8e92cf5a1772057169342ee4be9223174d4c20d7..181446b2fe86bc34c36ac88fb64409f989f727da 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -83,12 +83,6 @@ class CompilationInfo BASE_EMBEDDED {
     ASSERT(is_lazy());
     flags_ |= IsInLoop::encode(true);
   }
-  void MarkAsAllowingNativesSyntax() {
-    flags_ |= IsNativesSyntaxAllowed::encode(true);
-  }
-  bool allows_natives_syntax() const {
-    return IsNativesSyntaxAllowed::decode(flags_);
-  }
   void MarkAsNative() {
     flags_ |= IsNative::encode(true);
   }
@@ -199,8 +193,6 @@ class CompilationInfo BASE_EMBEDDED {
   class IsInLoop: public BitField<bool, 3, 1> {};
   // Strict mode - used in eager compilation.
   class IsStrictMode: public BitField<bool, 4, 1> {};
-  // Native syntax (%-stuff) allowed?
-  class IsNativesSyntaxAllowed: public BitField<bool, 5, 1> {};
   // Is this a function from our natives.
   class IsNative: public BitField<bool, 6, 1> {};