[Isolates] Move contents of Top into Isolate....

src/objects.h

 // Copyright 2006-2009 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 769 matching lines @@
 // Failure type tag info.
 const int kFailureTypeTagSize = 2;
 const int kFailureTypeTagMask = (1 << kFailureTypeTagSize) - 1;
 
 class Failure: public Object {
  public:
   // RuntimeStubs assumes EXCEPTION = 1 in the compiler-generated code.
   enum Type {
     RETRY_AFTER_GC = 0,
     EXCEPTION = 1,       // Returning this marker tells the real exception
-                         // is in Top::pending_exception.
+                         // is in Isolate::pending_exception.
     INTERNAL_ERROR = 2,
     OUT_OF_MEMORY_EXCEPTION = 3
   };
 
   inline Type type() const;
 
   // Returns the space that needs to be collected for RetryAfterGC failures.
   inline AllocationSpace allocation_space() const;
 
   // Returns the number of bytes requested (up to the representable maximum)
@@ skipping 4482 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_