Fix lint issue.

src/heap.h

 // 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 1150 matching lines @@
 
 // Cache for mapping (array, property name) into descriptor index.
 // The cache contains both positive and negative results.
 // Descriptor index equals kNotFound means the property is absent.
 // Cleared at startup and prior to any gc.
 class DescriptorLookupCache {
  public:
   // Lookup descriptor index for (map, name).
   // If absent, kAbsent is returned.
   static int Lookup(DescriptorArray* array, String* name) {
-    if(!StringShape(name).IsSymbol()) return kAbsent;
+    if (!StringShape(name).IsSymbol()) return kAbsent;
     int index = Hash(array, name);
     Key& key = keys_[index];
     if ((key.array == array) && (key.name == name)) return results_[index];
     return kAbsent;
   }
 
   // Update an element in the cache.
   static void Update(DescriptorArray* array, String* name, int result) {
     ASSERT(result != kAbsent);
-    if(StringShape(name).IsSymbol()) {
+    if (StringShape(name).IsSymbol()) {
       int index = Hash(array, name);
       Key& key = keys_[index];
       key.array = array;
       key.name = name;
       results_[index] = result;
     }
   }
 
   // Clear the cache.
   static void Clear();
@@ skipping 189 matching lines @@
   int marked_count_;
 
   // The count from the end of the previous full GC.  Will be zero if there
   // was no previous full GC.
   int previous_marked_count_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_