Add destroyDecodedDataIfPossible to ScriptResource to stop ScriptStreaming.

third_party/WebKit/Source/core/fetch/ScriptResource.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 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 53 matching lines @@
 }
 
 void ScriptResource::appendData(const char* data, size_t length)
 {
     Resource::appendData(data, length);
     ResourceClientWalker<ScriptResourceClient> walker(clients());
     while (ScriptResourceClient* client = walker.next())
         client->notifyAppendData(this);
 }
 
+void ScriptResource::destroyDecodedDataIfPossible()

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

... and especially here... destroyDecodedDataIfPossible does not in fact destroy
any data.

So maybe a less surprising name would be "notifyCancel" or
"notifyCancelToClients" (or whatever the Blink naming convention is, I don't
remember).

+{
+    ResourceClientWalker<ScriptResourceClient> walker(clients());
+    while (ScriptResourceClient* client = walker.next())
+        client->notifyCancel(this);
+}
+
 void ScriptResource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail, WebProcessMemoryDump* memoryDump) const
 {
     Resource::onMemoryDump(levelOfDetail, memoryDump);
     const String name = getMemoryDumpName() + "/decoded_script";
     auto dump = memoryDump->createMemoryAllocatorDump(name);
     dump->addScalar("size", "bytes", m_script.charactersSizeInBytes());
     memoryDump->addSuballocation(dump->guid(), String(WTF::Partitions::kAllocatedObjectPoolName));
 }
 
 const String& ScriptResource::script()
@@ skipping 31 matching lines @@
 }
 bool ScriptResource::mustRefetchDueToIntegrityMetadata(const FetchRequest& request) const
 {
     if (request.integrityMetadata().isEmpty())
         return false;
 
     return !IntegrityMetadata::setsEqual(m_integrityMetadata, request.integrityMetadata());
 }
 
 } // namespace blink