Support external arrays in Crankshaft

src/objects.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 565 matching lines @@
   // Boundaries for testing the type is a JavaScript "object".  Note that
   // function objects are not counted as objects, even though they are
   // implemented as such; only values whose typeof is "object" are included.
   FIRST_JS_OBJECT_TYPE = JS_VALUE_TYPE,
   LAST_JS_OBJECT_TYPE = JS_REGEXP_TYPE,
   // RegExp objects have [[Class]] "function" because they are callable.
   // All types from this type and above are objects with [[Class]] "function".
   FIRST_FUNCTION_CLASS_TYPE = JS_REGEXP_TYPE
 };
 
+static const int kExternalArrayTypeCount = LAST_EXTERNAL_ARRAY_TYPE -
+    FIRST_EXTERNAL_ARRAY_TYPE + 1;
 
 STATIC_CHECK(JS_OBJECT_TYPE == Internals::kJSObjectType);
 STATIC_CHECK(FIRST_NONSTRING_TYPE == Internals::kFirstNonstringType);
 STATIC_CHECK(PROXY_TYPE == Internals::kProxyType);
 
 
 enum CompareResult {
   LESS      = -1,
   EQUAL     =  0,
   GREATER   =  1,
@@ skipping 6050 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_