Harden more runtime functions

src/runtime.h

 // Copyright 2012 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_H_
 #define V8_RUNTIME_H_
 
 #include "allocation.h"
 #include "zone.h"
 
@@ skipping 847 matching lines @@
   enum TypedArrayId {
     // arrayIds below should be synchromized with typedarray.js natives.
     ARRAY_ID_UINT8 = 1,
     ARRAY_ID_INT8 = 2,
     ARRAY_ID_UINT16 = 3,
     ARRAY_ID_INT16 = 4,
     ARRAY_ID_UINT32 = 5,
     ARRAY_ID_INT32 = 6,
     ARRAY_ID_FLOAT32 = 7,
     ARRAY_ID_FLOAT64 = 8,
-    ARRAY_ID_UINT8_CLAMPED = 9
+    ARRAY_ID_UINT8_CLAMPED = 9,
+
+    ARRAY_ID_FIRST = ARRAY_ID_UINT8,
+    ARRAY_ID_LAST = ARRAY_ID_UINT8_CLAMPED
   };
 
   static void ArrayIdToTypeAndSize(int array_id,
       ExternalArrayType *type,
       ElementsKind* external_elements_kind,
       ElementsKind* fixed_elements_kind,
       size_t *element_size);
 
   // Used in runtime.cc and hydrogen's VisitArrayLiteral.
   MUST_USE_RESULT static MaybeHandle<Object> CreateArrayLiteralBoilerplate(
       Isolate* isolate,
       Handle<FixedArray> literals,
       Handle<FixedArray> elements);
 };
 
 
 //---------------------------------------------------------------------------
 // Constants used by interface to runtime functions.
 
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_