Eliminate extended mode, and other modes clean-up

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 328a8739d8189d9cc5fb261c9a573357e7b63ece..6096cf86b38ec72bda862ee3d186dd771729fda1 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5132,39 +5132,21 @@ int SharedFunctionInfo::profiler_ticks() {
 }
 
 
-LanguageMode SharedFunctionInfo::language_mode() {
-  int hints = compiler_hints();
-  if (BooleanBit::get(hints, kExtendedModeFunction)) {
-    ASSERT(BooleanBit::get(hints, kStrictModeFunction));
-    return EXTENDED_MODE;
-  }
-  return BooleanBit::get(hints, kStrictModeFunction)
-      ? STRICT_MODE : SLOPPY_MODE;
+StrictMode SharedFunctionInfo::strict_mode() {
+  return BooleanBit::get(compiler_hints(), kStrictModeFunction)
+      ? STRICT : SLOPPY;
 }
 
 
-void SharedFunctionInfo::set_language_mode(LanguageMode language_mode) {
-  // We only allow language mode transitions that go set the same language mode
-  // again or go up in the chain:
-  //   SLOPPY_MODE -> STRICT_MODE -> EXTENDED_MODE.
-  ASSERT(this->language_mode() == SLOPPY_MODE ||
-         this->language_mode() == language_mode ||
-         language_mode == EXTENDED_MODE);
+void SharedFunctionInfo::set_strict_mode(StrictMode strict_mode) {
+  // We only allow mode transitions from sloppy to strict.
+  ASSERT(this->strict_mode() == SLOPPY || this->strict_mode() == strict_mode);
   int hints = compiler_hints();
-  hints = BooleanBit::set(
-      hints, kStrictModeFunction, language_mode != SLOPPY_MODE);
-  hints = BooleanBit::set(
-      hints, kExtendedModeFunction, language_mode == EXTENDED_MODE);
+  hints = BooleanBit::set(hints, kStrictModeFunction, strict_mode == STRICT);
   set_compiler_hints(hints);
 }
 
 
-bool SharedFunctionInfo::is_sloppy_mode() {
-  return !BooleanBit::get(compiler_hints(), kStrictModeFunction);
-}
-
-BOOL_GETTER(SharedFunctionInfo, compiler_hints, is_extended_mode,
-            kExtendedModeFunction)
 BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, native, kNative)
 BOOL_ACCESSORS(SharedFunctionInfo, compiler_hints, inline_builtin,
                kInlineBuiltin)