Split ImageResourceClient into ResourceClient and ImageResourceObserver [1/2]

third_party/WebKit/Source/core/fetch/ResourceFetcher.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) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 403 matching lines @@
 
     if (request.forPreload()) {
         DEFINE_RESOURCE_HISTOGRAM("Preload.");
     } else {
         DEFINE_RESOURCE_HISTOGRAM("");
     }
     // Aims to count Resource only referenced from MemoryCache (i.e. what
     // would be dead if MemoryCache holds weak references to Resource).
     // Currently we check references to Resource from ResourceClient and
     // |m_preloads| only, because they are major sources of references.
-    if (resource && !resource->hasClients() && (!m_preloads || !m_preloads->contains(resource)) && !isStaticData) {
+    if (resource && !resource->hasClientsOrObservers() && (!m_preloads || !m_preloads->contains(resource)) && !isStaticData) {
         DEFINE_RESOURCE_HISTOGRAM("Dead.");
     }
 
     switch (policy) {
     case Reload:
         memoryCache()->remove(resource.get());
         // Fall through
     case Load:
         resource = createResourceForLoading(request, request.charset(), factory);
         break;
     case Revalidate:
         initializeRevalidation(request, resource.get());
         break;
     case Use:
         memoryCache()->updateForAccess(resource.get());
         break;
     }
 
     if (!resource)
         return nullptr;
     if (resource->getType() != factory.type()) {
         ASSERT(request.forPreload());
         return nullptr;
     }
 
-    if (!resource->hasClients())
+    if (!resource->hasClientsOrObservers())
         m_deadStatsRecorder.update(policy);
 
     if (policy != Use)
         resource->setIdentifier(createUniqueIdentifier());
 
     if (!request.forPreload() || policy != Use) {
         ResourceLoadPriority priority = loadPriority(factory.type(), request, ResourcePriority::NotVisible);
         // When issuing another request for a resource that is already in-flight make
         // sure to not demote the priority of the in-flight request. If the new request
         // isn't at the same priority as the in-flight request, only allow promotions.
@@ skipping 617 matching lines @@
         return;
 
     TRACE_EVENT0("blink", "ResourceLoadPriorityOptimizer::updateAllImageResourcePriorities");
     for (const auto& loader : m_loaders->hashSet()) {
         ASSERT(loader);
         Resource* resource = loader->cachedResource();
         ASSERT(resource);
         if (!resource->isImage())
             continue;
 
-        ResourcePriority resourcePriority = resource->priorityFromClients();
+        ResourcePriority resourcePriority = resource->priorityFromObservers();
         ResourceLoadPriority resourceLoadPriority = loadPriority(Resource::Image, FetchRequest(resource->resourceRequest(), FetchInitiatorInfo()), resourcePriority.visibility);
         if (resourceLoadPriority == resource->resourceRequest().priority())
             continue;
 
         resource->didChangePriority(resourceLoadPriority, resourcePriority.intraPriorityValue);
         TRACE_EVENT_ASYNC_STEP_INTO1("blink.net", "Resource", resource, "ChangePriority", "priority", resourceLoadPriority);
         context().dispatchDidChangeResourcePriority(resource->identifier(), resourceLoadPriority, resourcePriority.intraPriorityValue);
     }
 }
 
@@ skipping 111 matching lines @@
     visitor->trace(m_loaders);
     visitor->trace(m_nonBlockingLoaders);
 #if ENABLE(OILPAN)
     visitor->trace(m_documentResources);
     visitor->trace(m_preloads);
     visitor->trace(m_resourceTimingInfoMap);
 #endif
 }
 
 } // namespace blink