Do not use default for switch over AllocationSpace.

src/heap-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_INL_H_
 #define V8_HEAP_INL_H_
 
 #include <cmath>
 
 #include "heap.h"
@@ skipping 383 matching lines @@
           (obj->IsExternalString() && ExternalString::cast(obj)->is_short()));
     case OLD_DATA_SPACE:
       return dst == src && dst == TargetSpaceId(type);
     case CODE_SPACE:
       return dst == src && type == CODE_TYPE;
     case MAP_SPACE:
     case CELL_SPACE:
     case PROPERTY_CELL_SPACE:
     case LO_SPACE:
       return false;
-    default:
+    case INVALID_SPACE:
       break;
   }
   UNREACHABLE();
   return false;
 }
 
 
 void Heap::CopyBlock(Address dst, Address src, int byte_size) {
   CopyWords(reinterpret_cast<Object**>(dst),
             reinterpret_cast<Object**>(src),
@@ skipping 353 matching lines @@
 
 
 double GCTracer::SizeOfHeapObjects() {
   return (static_cast<double>(heap_->SizeOfObjects())) / MB;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_