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+steps towards a working picture element
+--------------------
+* Should I insist on compiling chromium with vanilla WebKit?
+* HTMLPictureElement: public HTMLImageElement
+* What do we want to do with ImageInnerElement? Should we duplicate a
+  similar one as HTMLPictureElement's shadow DOM, and can we use it as is?
+* Add handling of <picture> tag to the PreloadScanner
+* How can I do media queries eval inside the preload scanner?
+  MediaQueryMatcher? All I need to get started is get the window
+dimensions from somewhere... 
+* How can I scan source tags with the preload scanner?
+* What the hell does the HTMLTagNames.in syntax mean !?!?!?
+* Add HTMLPictureElement.h include to HTMLElementFactory by changing
+  make_names.pl