Allow themes to change the background of the new tab page....

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
===================================================================
--- chrome/common/extensions/extension.h	(revision 17403)
+++ chrome/common/extensions/extension.h	(working copy)
@@ -51,6 +51,7 @@
   static const wchar_t* kThemeImagesKey;
   static const wchar_t* kThemeColorsKey;
   static const wchar_t* kThemeTintsKey;
+  static const wchar_t* kThemeDisplayPropertiesKey;
   static const wchar_t* kToolstripsKey;
   static const wchar_t* kTooltipKey;
   static const wchar_t* kTypeKey;
@@ -161,6 +162,9 @@
   DictionaryValue* GetThemeImages() const { return theme_images_.get(); }
   DictionaryValue* GetThemeColors() const { return theme_colors_.get(); }
   DictionaryValue* GetThemeTints() const { return theme_tints_.get(); }
+  DictionaryValue* GetThemeDisplayProperties() const {
+    return theme_display_properties_.get();
+  }
   bool IsTheme() { return is_theme_; }
 
  private:
@@ -238,6 +242,9 @@
   // A map of color names to colors.
   scoped_ptr<DictionaryValue> theme_tints_;
 
+  // A map of display properties.
+  scoped_ptr<DictionaryValue> theme_display_properties_;
+
   // Whether the extension is a theme - if it is, certain things are disabled.
   bool is_theme_;