Introduce LanguageMode, drop StrictMode.

src/runtime/runtime-utils.h

 // Copyright 2014 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.
 
 #ifndef V8_RUNTIME_RUNTIME_UTILS_H_
 #define V8_RUNTIME_RUNTIME_UTILS_H_
 
 
 namespace v8 {
 namespace internal {
@@ skipping 52 matching lines @@
 
 
 // Cast the given argument to PropertyDetails and store its value in a
 // variable with the given name.  If the argument is not a Smi call
 // IllegalOperation and return.
 #define CONVERT_PROPERTY_DETAILS_CHECKED(name, index) \
   RUNTIME_ASSERT(args[index]->IsSmi());               \
   PropertyDetails name = PropertyDetails(Smi::cast(args[index]));
 
 
-// Assert that the given argument has a valid value for a StrictMode
-// and store it in a StrictMode variable with the given name.
-#define CONVERT_STRICT_MODE_ARG_CHECKED(name, index) \
-  RUNTIME_ASSERT(args[index]->IsSmi());              \
-  RUNTIME_ASSERT(args.smi_at(index) == STRICT ||     \
-                 args.smi_at(index) == SLOPPY);      \
-  StrictMode name = static_cast<StrictMode>(args.smi_at(index));
+// Assert that the given argument has a valid value for a LanguageMode
+// and store it in a LanguageMode variable with the given name.
+#define CONVERT_LANGUAGE_MODE_ARG_CHECKED(name, index)        \
+  RUNTIME_ASSERT(args[index]->IsSmi());                       \
+  RUNTIME_ASSERT(is_valid_language_mode(args.smi_at(index))); \
+  LanguageMode name = static_cast<LanguageMode>(args.smi_at(index));
 
 
 // Assert that the given argument is a number within the Int32 range
 // and convert it to int32_t.  If the argument is not an Int32 call
 // IllegalOperation and return.
 #define CONVERT_INT32_ARG_CHECKED(name, index) \
   RUNTIME_ASSERT(args[index]->IsNumber());     \
   int32_t name = 0;                            \
   RUNTIME_ASSERT(args[index]->ToInt32(&name));
 
@@ skipping 48 matching lines @@
 #else
 #error Unknown endianness
 #endif
 }
 #endif
 
 }
 }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_RUNTIME_UTILS_H_