Make the DOMUIThemeSource load and pass through a PNG, rather than relying on...

app/theme_provider.h

Index: app/theme_provider.h
===================================================================
--- app/theme_provider.h	(revision 22426)
+++ app/theme_provider.h	(working copy)
@@ -5,6 +5,8 @@
 #ifndef APP_THEME_PROVIDER_H_
 #define APP_THEME_PROVIDER_H_
 
+#include <vector>
+
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
 
@@ -58,6 +60,10 @@
   // doesn't provide a certain image, but custom themes might (badges, etc).
   virtual bool HasCustomImage(int id) = 0;
 
+  // Reads the image data from the theme file into the specified vector. Returns
+  // true on success.
+  virtual bool GetRawData(int id, std::vector<unsigned char>* raw_data) = 0;
+
 #if defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
   // Gets the GdkPixbuf with the specified |id|.  Returns a pointer to a shared
   // instance of the GdkPixbuf.  This shared GdkPixbuf is owned by the theme