Add destroyDecodedDataIfPossible to ScriptResource to stop ScriptStreaming.

third_party/WebKit/Source/core/fetch/ScriptResource.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008 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
     version 2 of the License, or (at your option) any later version.
@@ skipping 32 matching lines @@
 class ResourceFetcher;
 class ScriptResource;
 
 class CORE_EXPORT ScriptResourceClient : public GarbageCollectedMixin, public ResourceClient {
 public:
     ~ScriptResourceClient() override {}
     static bool isExpectedType(ResourceClient* client) { return client->getResourceClientType() == ScriptType; }
     ResourceClientType getResourceClientType() const final { return ScriptType; }
 
     virtual void notifyAppendData(ScriptResource* resource) { }
+    virtual void notifyCancel(ScriptResource* resource) { }
 
     DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 class CORE_EXPORT ScriptResource final : public TextResource {
 public:
     using ClientType = ScriptResourceClient;
     static ScriptResource* fetch(FetchRequest&, ResourceFetcher*);
 
     // Public for testing
@@ skipping 28 matching lines @@
         ScriptResourceFactory()
             : ResourceFactory(Resource::Script) { }
 
         Resource* create(const ResourceRequest& request, const ResourceLoaderOptions& options, const String& charset) const override
         {
             return new ScriptResource(request, options, charset);
         }
     };
 
     ScriptResource(const ResourceRequest&, const ResourceLoaderOptions&, const String& charset);
+    void destroyDecodedDataIfPossible() override;

[marja, 2016/08/17 08:37:40]

I find this name surprising. It's not clear what's the connection between
cancelling <-> destroying decoded data.

 
     ScriptIntegrityDisposition m_integrityDisposition;
     IntegrityMetadataSet m_integrityMetadata;
 
     AtomicString m_script;
 };
 
 DEFINE_RESOURCE_TYPE_CASTS(Script);
 
 } // namespace blink
 
 #endif