[Isolates] Cleanup some Isolate usages.

src/scopeinfo.cc

 // Copyright 2006-2008 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 431 matching lines @@
     while (p != end) {
       if (*p == name) return static_cast<int>(p - p0);
       p++;
     }
   }
   return -1;
 }
 
 int SerializedScopeInfo::ContextSlotIndex(String* name, Variable::Mode* mode) {
   ASSERT(name->IsSymbol());
-  Isolate* isolate = Isolate::Current();
+  Isolate* isolate = GetIsolate();
   int result = isolate->context_slot_cache()->Lookup(this, name, mode);
   if (result != ContextSlotCache::kNotFound) return result;
   if (length() > 0) {
     // Slots start after length entry.
     Object** p0 = ContextEntriesAddr();
     int number_of_context_slots;
     p0 = ReadInt(p0, &number_of_context_slots);
     Object** p = p0;
     Object** end = p0 + number_of_context_slots * 2;
     while (p != end) {
@@ skipping 160 matching lines @@
 }
 #endif  // DEBUG
 
 
 // Make sure the classes get instantiated by the template system.
 template class ScopeInfo<FreeStoreAllocationPolicy>;
 template class ScopeInfo<PreallocatedStorage>;
 template class ScopeInfo<ZoneListAllocationPolicy>;
 
 } }  // namespace v8::internal