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

third_party/WebKit/Source/core/fetch/Resource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
     rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
@@ skipping 687 matching lines @@
     if (m_preloadDiscoveryTime) {
       int timeSinceDiscovery = static_cast<int>(
           1000 * (monotonicallyIncreasingTime() - m_preloadDiscoveryTime));
       DEFINE_STATIC_LOCAL(CustomCountHistogram, preloadDiscoveryHistogram,
                           ("PreloadScanner.ReferenceTime", 0, 10000, 50));
       preloadDiscoveryHistogram.count(timeSinceDiscovery);
     }
   }
   if (!hasClientsOrObservers()) {
     m_isAlive = true;
-    memoryCache()->makeLive(this);
   }
 }
 
 void Resource::addClient(ResourceClient* client,
                          PreloadReferencePolicy policy) {
   CHECK(!m_isAddRemoveClientProhibited);
 
   willAddClientOrObserver(policy);
 
   if (m_isRevalidating) {
@@ skipping 30 matching lines @@
 
   if (m_clientsAwaitingCallback.isEmpty())
     ResourceCallback::callbackHandler().cancel(this);
 
   didRemoveClientOrObserver();
 }
 
 void Resource::didRemoveClientOrObserver() {
   if (!hasClientsOrObservers() && m_isAlive) {
     m_isAlive = false;
-    memoryCache()->makeDead(this);
     allClientsAndObserversRemoved();
 
     // RFC2616 14.9.2:
     // "no-store: ... MUST make a best-effort attempt to remove the information
     // from volatile storage as promptly as possible"
     // "... History buffers MAY store such responses as part of their normal
     // operation."
     // We allow non-secure content to be reused in history, but we do not allow
     // secure content to be reused.
     if (hasCacheControlNoStoreHeader() && url().protocolIs("https"))
@@ skipping 13 matching lines @@
   if (!hasClientsOrObservers() && m_loader)
     m_loader->cancel();
 }
 
 void Resource::setDecodedSize(size_t decodedSize) {
   if (decodedSize == m_decodedSize)
     return;
   size_t oldSize = size();
   m_decodedSize = decodedSize;
   memoryCache()->update(this, oldSize, size());
-  memoryCache()->updateDecodedResource(this, UpdateForPropertyChange);
 }
 
 void Resource::setEncodedSize(size_t encodedSize) {
   if (encodedSize == m_encodedSize && encodedSize == m_encodedSizeMemoryUsage)
     return;
   size_t oldSize = size();
   m_encodedSize = encodedSize;
   m_encodedSizeMemoryUsage = encodedSize;
   memoryCache()->update(this, oldSize, size());
 }
 
 void Resource::setEncodedSizeMemoryUsage(size_t encodedSize) {
   m_encodedSizeMemoryUsage = encodedSize;
 }
 
-void Resource::didAccessDecodedData() {
-  memoryCache()->updateDecodedResource(this, UpdateForAccess);
-}
-
 void Resource::finishPendingClients() {
   // We're going to notify clients one by one. It is simple if the client does
   // nothing. However there are a couple other things that can happen.
   //
   // 1. Clients can be added during the loop. Make sure they are not processed.
   // 2. Clients can be removed during the loop. Make sure they are always
   //    available to be removed. Also don't call removed clients or add them
   //    back.
   //
   // Handle case (1) by saving a list of clients to notify. A separate list also
@@ skipping 280 matching lines @@
     case Resource::TextTrack:
     case Resource::Media:
     case Resource::Manifest:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace blink