Add picture related attributes to Source

Source/core/html/HTMLSourceElement.h

Index: Source/core/html/HTMLSourceElement.h
diff --git a/Source/core/html/HTMLSourceElement.h b/Source/core/html/HTMLSourceElement.h
index 6df81ff4f0a70932c02b2ea4ede8565cb75492e1..0b64bcf93523f05cc7a670c141bf30dcceb57a39 100644
--- a/Source/core/html/HTMLSourceElement.h
+++ b/Source/core/html/HTMLSourceElement.h
@@ -40,6 +40,9 @@ public:
     virtual ~HTMLSourceElement();
 
     const AtomicString& type() const;
+    const AtomicString& media() const;

[Nils Barth (inactive), 2014/05/09 01:56:25]

As noted, not needed if only using from JavaScript.
I'd suggest only adding these if and when you access them from C++ (avoid dead
code).

+    const AtomicString& srcset() const;
+    const AtomicString& sizes() const;
     void setSrc(const String&);
     void setType(const AtomicString&);