<picture>: Update the <img> element when a <source> changes

Source/core/html/HTMLPictureElement.cpp

Index: Source/core/html/HTMLPictureElement.cpp
diff --git a/Source/core/html/HTMLPictureElement.cpp b/Source/core/html/HTMLPictureElement.cpp
index f5a3d95c8c7e9eba160320900a4aabff72adf0f7..76878541166c8e663e84fda2325ce2c06ba8657a 100644
--- a/Source/core/html/HTMLPictureElement.cpp
+++ b/Source/core/html/HTMLPictureElement.cpp
@@ -6,6 +6,8 @@
 #include "core/html/HTMLPictureElement.h"
 
 #include "HTMLNames.h"
+#include "core/dom/ElementTraversal.h"
+#include "core/html/HTMLImageElement.h"
 
 namespace WebCore {
 
@@ -17,4 +19,12 @@ HTMLPictureElement::HTMLPictureElement(Document& document)
     ScriptWrappable::init(this);
 }
 
+void HTMLPictureElement::sourceOrMediaChanged()
+{
+    for (HTMLImageElement* imageElement = Traversal<HTMLImageElement>::firstChild(*this); imageElement; imageElement = Traversal<HTMLImageElement>::nextSibling(*imageElement)) {
+        imageElement->selectSourceURL(false);
+    }
+

[Yoav Weiss, 2014/05/23 07:39:17]

We can get rid of the braces and the extra newline here, no?

[cbiesinger, 2014/05/23 19:30:37]

Deleted the newline but I like the braces because the for statement is pretty
long. The style guide seems to allow that.

+}
+
 } // namespace