X64: Checked and slightly modified Object layouts to be compatible with 64-bit pointers.

src/log.cc

 // Copyright 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 1248 matching lines @@
       return "OTHER";
     default:
       UNREACHABLE();
       return NULL;
   }
 }
 
 VMState::VMState(StateTag state) {
 #if !defined(ENABLE_HEAP_PROTECTION)
   // When not protecting the heap, there is no difference between
-  // EXTERNAL and OTHER.  As an optimizatin in that case, we will not
+  // EXTERNAL and OTHER.  As an optimization in that case, we will not
   // perform EXTERNAL->OTHER transitions through the API.  We thus
   // compress the two states into one.
   if (state == EXTERNAL) state = OTHER;
 #endif
   state_ = state;
   previous_ = Logger::current_state_;
   Logger::current_state_ = this;
 
   if (FLAG_log_state_changes) {
     LOG(UncheckedStringEvent("Entering", StateToString(state_)));
@@ skipping 36 matching lines @@
     } else if (previous_->state_ == EXTERNAL) {
       // We are leaving V8.
       Heap::Protect();
     }
   }
 #endif
 }
 #endif
 
 } }  // namespace v8::internal