Clean up a few TODO(isolates).

src/heap-inl.h

 // Copyright 2011 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 513 matching lines @@
     if (__maybe_object__->ToObject(&__object__)) RETURN_VALUE;            \
     if (__maybe_object__->IsOutOfMemory() ||                              \
         __maybe_object__->IsRetryAfterGC()) {                             \
       /* TODO(1181417): Fix this. */                                      \
       v8::internal::V8::FatalProcessOutOfMemory("CALL_AND_RETRY_2", true);\
     }                                                                     \
     RETURN_EMPTY;                                                         \
   } while (false)
 
 
-// TODO(isolates): cache isolate: either accept as a parameter or
-//                 set to some known symbol (__CUR_ISOLATE__?)
 #define CALL_HEAP_FUNCTION(ISOLATE, FUNCTION_CALL, TYPE)       \
   CALL_AND_RETRY(ISOLATE,                                      \
                  FUNCTION_CALL,                                \
                  return Handle<TYPE>(TYPE::cast(__object__), ISOLATE),  \
                  return Handle<TYPE>())
 
 
 #define CALL_HEAP_FUNCTION_VOID(ISOLATE, FUNCTION_CALL) \
   CALL_AND_RETRY(ISOLATE, FUNCTION_CALL, return, return)
 
@@ skipping 149 matching lines @@
 #ifdef DEBUG
   UpdateLiveObjectCount(obj);
 #endif
   obj->SetMark();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_