Class/struct layout optimization for blink Resource related classes

third_party/WebKit/Source/platform/loader/fetch/ResourceLoadPriority.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ResourceLoadPriority_h
 #define ResourceLoadPriority_h
 
 #include "platform/wtf/Allocator.h"
 
 namespace blink {
 
-enum ResourceLoadPriority : int {
+enum ResourceLoadPriority : int8_t {
   // The unresolved priority is here for the convenience of the clients. It
   // should not be passed to the ResourceLoadScheduler.
   kResourceLoadPriorityUnresolved = -1,
   kResourceLoadPriorityVeryLow = 0,
   kResourceLoadPriorityLow,
   kResourceLoadPriorityMedium,
   kResourceLoadPriorityHigh,
   kResourceLoadPriorityVeryHigh,
   kResourceLoadPriorityLowest = kResourceLoadPriorityVeryLow,
   kResourceLoadPriorityHighest = kResourceLoadPriorityVeryHigh,
@@ skipping 12 matching lines @@
   ResourcePriority(VisibilityStatus status, int intra_value)
       : visibility(status), intra_priority_value(intra_value) {}
 
   VisibilityStatus visibility;
   int intra_priority_value;
 };
 
 }  // namespace blink
 
 #endif