Add destroyDecodedDataIfPossible to ScriptResource to stop ScriptStreaming.

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

Index: third_party/WebKit/Source/core/fetch/ScriptResource.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ScriptResource.cpp b/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
index 19785d03ca6a97f6a1a45fb83f5d63fd9507f215..44896d93c10eb17cf8966309931b7d6b7270200f 100644
--- a/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
+++ b/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
@@ -71,6 +71,13 @@ void ScriptResource::appendData(const char* data, size_t length)
         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);