Add destroyDecodedDataIfPossible to ScriptResource to stop ScriptStreaming.

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

Index: third_party/WebKit/Source/core/fetch/ScriptResource.h
diff --git a/third_party/WebKit/Source/core/fetch/ScriptResource.h b/third_party/WebKit/Source/core/fetch/ScriptResource.h
index 036e26b59b7c8120423c19ea3d8201f7d4a5e78f..112a673d81bdb2136577908eca1945ba68ac0f78 100644
--- a/third_party/WebKit/Source/core/fetch/ScriptResource.h
+++ b/third_party/WebKit/Source/core/fetch/ScriptResource.h
@@ -50,6 +50,7 @@ public:
     ResourceClientType getResourceClientType() const final { return ScriptType; }
 
     virtual void notifyAppendData(ScriptResource* resource) { }
+    virtual void notifyCancel(ScriptResource* resource) { }
 
     DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
@@ -98,6 +99,7 @@ private:
     };
 
     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;