MemoryCache: Enable MemoryCache to have multiple isolated resource maps

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 336 matching lines @@
 bool Internals::isPreloaded(const String& url)
 {
     Document* document = contextDocument();
     return document->fetcher()->isPreloaded(url);
 }
 
 bool Internals::isLoadingFromMemoryCache(const String& url)
 {
     if (!contextDocument())
         return false;
-    Resource* resource = memoryCache()->resourceForURL(contextDocument()->completeURL(url));
+    // FIXME: There is no way to get the right cache key here. This function is
+    // only used for testing, so the default identifier should be ok for now.

[Mike West, 2014/10/24 12:43:00]

Doesn't this mean you're not going to get the correct test results when running
this for resources loaded via SW? How do you intend to test this otherwise?

[nhiroki, 2014/10/27 14:30:13]

I found the way to get the key here, so removed this comment.

+    const String cacheIdentifier = MemoryCache::defaultCacheIdentifier();
+    Resource* resource = memoryCache()->resourceForURL(cacheIdentifier, contextDocument()->completeURL(url));
     return resource && resource->status() == Resource::Cached;
 }
 
 bool Internals::isSharingStyle(Element* element1, Element* element2) const
 {
     ASSERT(element1 && element2);
     return element1->renderStyle() == element2->renderStyle();
 }
 
 bool Internals::isValidContentSelect(Element* insertionPoint, ExceptionState& exceptionState)
@@ skipping 1916 matching lines @@
     }
     toHTMLPlugInElement(element)->setPlaceholder(DictionaryPluginPlaceholder::create(element->document(), options));
 }
 
 Iterator* Internals::iterator(ScriptState* scriptState, ExceptionState& exceptionState)
 {
     return new InternalsIterator;
 }
 
 } // namespace blink