Support for selective DOM activity logging, based on IDL attributes.

Source/core/storage/Storage.idl

Index: Source/core/storage/Storage.idl
diff --git a/Source/core/storage/Storage.idl b/Source/core/storage/Storage.idl
index 089f2fced5cf4d2741e5a7e2e9e75928936e585f..3d0364b097557951186a806c248a62cdce562bd8 100644
--- a/Source/core/storage/Storage.idl
+++ b/Source/core/storage/Storage.idl
@@ -32,9 +32,9 @@
 ] interface Storage {
     [NotEnumerable, GetterRaisesException] readonly attribute unsigned long length;
     [NotEnumerable, TreatReturnedNullStringAs=Null, RaisesException] DOMString key(unsigned long index);
-    [NotEnumerable, TreatReturnedNullStringAs=Null, RaisesException] DOMString getItem(DOMString key);
-    [NotEnumerable, RaisesException] void setItem(DOMString key, DOMString data);
-    [NotEnumerable, RaisesException] void removeItem(DOMString key);
-    [NotEnumerable, RaisesException] void clear();
+    [NotEnumerable, TreatReturnedNullStringAs=Null, PerWorldBindings, ActivityLog=AccessForIsolatedWorlds, RaisesException] DOMString getItem(DOMString key);
+    [NotEnumerable, RaisesException, PerWorldBindings, ActivityLog=AccessForIsolatedWorlds] void setItem(DOMString key, DOMString data);
+    [NotEnumerable, RaisesException, PerWorldBindings, ActivityLog=AccessForIsolatedWorlds] void removeItem(DOMString key);
+    [NotEnumerable, RaisesException, PerWorldBindings, ActivityLog=AccessForIsolatedWorlds] void clear();
 };