[Experiment] purge-and-suspend

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
     License as published by the Free Software Foundation; either
@@ skipping 91 matching lines @@
     }
     ~CachedMetadataHandlerImpl() override {}
     DECLARE_VIRTUAL_TRACE();
     void setCachedMetadata(unsigned, const char*, size_t, CacheType) override;
     void clearCachedMetadata(CacheType) override;
     CachedMetadata* cachedMetadata(unsigned) const override;
     String encoding() const override;
     // Sets the serialized metadata retrieved from the platform's cache.
     void setSerializedCachedMetadata(const char*, size_t);
 
+    void prune() override;
+
 protected:
     explicit CachedMetadataHandlerImpl(Resource*);
     virtual void sendToPlatform();
     const ResourceResponse& response() const { return m_resource->response(); }
 
     RefPtr<CachedMetadata> m_cachedMetadata;
 
 private:
     Member<Resource> m_resource;
 };
@@ skipping 51 matching lines @@
 void Resource::CachedMetadataHandlerImpl::sendToPlatform()
 {
     if (m_cachedMetadata) {
         const Vector<char>& serializedData = m_cachedMetadata->serialize();
         Platform::current()->cacheMetadata(response().url(), response().responseTime(), serializedData.data(), serializedData.size());
     } else {
         Platform::current()->cacheMetadata(response().url(), response().responseTime(), nullptr, 0);
     }
 }
 
+void Resource::CachedMetadataHandlerImpl::prune()
+{
+    clearCachedMetadata(CachedMetadataHandler::CacheLocally);
+}
+
 class Resource::ServiceWorkerResponseCachedMetadataHandler : public Resource::CachedMetadataHandlerImpl {
 public:
     static Resource::CachedMetadataHandlerImpl* create(Resource* resource, SecurityOrigin* securityOrigin)
     {
         return new ServiceWorkerResponseCachedMetadataHandler(resource, securityOrigin);
     }
     ~ServiceWorkerResponseCachedMetadataHandler() override {}
     DECLARE_VIRTUAL_TRACE();
 
 protected:
@@ skipping 628 matching lines @@
     if (scheduled && m_clientsAwaitingCallback.isEmpty())
         ResourceCallback::callbackHandler().cancel(this);
 
     // Prevent the case when there are clients waiting but no callback scheduled.
     ASSERT(m_clientsAwaitingCallback.isEmpty() || scheduled);
 }
 
 void Resource::prune()
 {
     destroyDecodedDataIfPossible();
+    if (m_cacheHandler)
+        m_cacheHandler->prune();
     unlock();
 }
 
 void Resource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail, WebProcessMemoryDump* memoryDump) const
 {
     static const size_t kMaxURLReportLength = 128;
     static const int kMaxResourceClientToShowInMemoryInfra = 10;
 
     const String dumpName = getMemoryDumpName();
     WebMemoryAllocatorDump* dump = memoryDump->createMemoryAllocatorDump(dumpName);
@@ skipping 287 matching lines @@
     case Resource::Media:
         return "Media";
     case Resource::Manifest:
         return "Manifest";
     }
     ASSERT_NOT_REACHED();
     return "Unknown";
 }
 
 } // namespace blink