Use Chrome compatible naming for compiler specifics.

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index 320ad75d817aaa3eddf7dd72defad0314c082690..0ea7f6d9354fa3669411e4f91fef36d9b0baa716 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -727,14 +727,14 @@ class StringTableInsertionKey : public HashTableKey {
     return string_->SlowEquals(String::cast(string));
   }
 
-  virtual uint32_t Hash() V8_OVERRIDE { return hash_; }
+  virtual uint32_t Hash() OVERRIDE { return hash_; }
 
-  virtual uint32_t HashForObject(Object* key) V8_OVERRIDE {
+  virtual uint32_t HashForObject(Object* key) OVERRIDE {
     return String::cast(key)->Hash();
   }
 
   MUST_USE_RESULT virtual Handle<Object> AsHandle(Isolate* isolate)
-      V8_OVERRIDE {
+      OVERRIDE {
     return handle(string_, isolate);
   }