Create ResourceProgressEvent, expose as Chromium API

Source/core/dom/ResourceProgressEvent.idl

Index: Source/core/dom/ResourceProgressEvent.idl
diff --git a/Source/wtf/ArrayBufferDeallocationObserver.h b/Source/core/dom/ResourceProgressEvent.idl
similarity index 68%
copy from Source/wtf/ArrayBufferDeallocationObserver.h
copy to Source/core/dom/ResourceProgressEvent.idl
index f75d729c14eccb4a683378b6d95235a1ca701e30..c08192a0a34a8819ab9dd8ae274d62ea244d6505 100644
--- a/Source/wtf/ArrayBufferDeallocationObserver.h
+++ b/Source/core/dom/ResourceProgressEvent.idl
@@ -1,5 +1,4 @@
 /*
- * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -21,21 +20,19 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#ifndef ArrayBufferDeallocationObserver_h
-#define ArrayBufferDeallocationObserver_h
-
-namespace WTF {
-
-// The current implementation assumes that the instance of this class is a
-// singleton living for the entire process's lifetime.
-class ArrayBufferDeallocationObserver {
-public:
-    virtual void ArrayBufferDeallocated(unsigned sizeInBytes) = 0;
+// ResourceProgressEvent is a non-standard class that is simply a ProgressEvent
+// with an additional read-only "url" property containing a string URL. This is
+// used by the Chromium NaCl integration to indicate to which resource the
+// event applies. This is useful because the NaCl integration will download
+// (and translate in the case of PNaCl) multiple binary files. It is not
+// constructable by web content at all, and so does not provide the usual
+// EventInit pattern for Event construction.
+[
+    NoInterfaceObject,
+] interface ResourceProgressEvent : ProgressEvent {
+    readonly attribute DOMString url;
 };
 
-} // namespace WTF
-
-#endif // ArrayBufferDeallocationObserver_h