[WeakMemoryCache] Remove LRU lists, prune order control and live/dead distinction

third_party/WebKit/Source/web/WebCache.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * 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
@@ skipping 22 matching lines @@
 #include "core/fetch/MemoryCache.h"
 
 namespace blink {
 
 // A helper method for coverting a MemoryCache::TypeStatistic to a
 // WebCache::ResourceTypeStat.
 static void ToResourceTypeStat(const MemoryCache::TypeStatistic& from,
                                WebCache::ResourceTypeStat& to) {
   to.count = from.count;
   to.size = from.size;
-  to.liveSize = from.liveSize;
+  // TODO(hiroshige): remove |liveSize| as it is no longer meaningful.
+  to.liveSize = from.size;
   to.decodedSize = from.decodedSize;
 }
 
-void WebCache::setCapacities(size_t minDeadCapacity,
-                             size_t maxDeadCapacity,
-                             size_t capacity) {
+// TODO(hiroshige): remove parameters that are no longer meaningful.
+void WebCache::setCapacities(size_t, size_t, size_t capacity) {
   MemoryCache* cache = memoryCache();
   if (cache)
-    cache->setCapacities(static_cast<unsigned>(minDeadCapacity),
-                         static_cast<unsigned>(maxDeadCapacity),
-                         static_cast<unsigned>(capacity));
+    cache->setCapacity(static_cast<unsigned>(capacity));
 }
 
 void WebCache::clear() {
   MemoryCache* cache = memoryCache();
   if (cache)
     cache->evictResources();
 }
 
 void WebCache::getUsageStats(UsageStats* result) {
   DCHECK(result);
 
   MemoryCache* cache = memoryCache();
   if (cache) {
-    result->minDeadCapacity = cache->minDeadCapacity();
-    result->maxDeadCapacity = cache->maxDeadCapacity();
+    // TODO(hiroshige): remove members that are no longer meaningful.
+    result->minDeadCapacity = 0;
+    result->maxDeadCapacity = 0;
     result->capacity = cache->capacity();
-    result->liveSize = cache->liveSize();
-    result->deadSize = cache->deadSize();
+    result->liveSize = cache->size();
+    result->deadSize = 0;
   } else
     memset(result, 0, sizeof(UsageStats));
 }
 
 void WebCache::getResourceTypeStats(ResourceTypeStats* result) {
   MemoryCache* cache = memoryCache();
   if (cache) {
     MemoryCache::Statistics stats = cache->getStatistics();
     ToResourceTypeStat(stats.images, result->images);
     ToResourceTypeStat(stats.cssStyleSheets, result->cssStyleSheets);
     ToResourceTypeStat(stats.scripts, result->scripts);
     ToResourceTypeStat(stats.xslStyleSheets, result->xslStyleSheets);
     ToResourceTypeStat(stats.fonts, result->fonts);
     ToResourceTypeStat(stats.other, result->other);
   } else
     memset(result, 0, sizeof(WebCache::ResourceTypeStats));
 }
 
 }  // namespace blink