GTK: Port omnibox drawing from GdkGC interface to cairo.

chrome/browser/themes/theme_service.h

Index: chrome/browser/themes/theme_service.h
diff --git a/chrome/browser/themes/theme_service.h b/chrome/browser/themes/theme_service.h
index 2534f71d680c2ada6f3b85fe0be11d9717d34bfe..a6c01c48455adee1fd34795ca65e0ceca4f7f304 100644
--- a/chrome/browser/themes/theme_service.h
+++ b/chrome/browser/themes/theme_service.h
@@ -28,6 +28,10 @@ namespace color_utils {
 struct HSL;
 }
 
+namespace gfx {
+class Image;
+}
+
 namespace ui {
 class ResourceBundle;
 }
@@ -140,6 +144,13 @@ class ThemeService : public base::NonThreadSafe,
     REPEAT = 3
   } Tiling;
 
+  // Returns a cross platform image for an id.
+  //
+  // TODO(erg): Make this a virtual, exposed through ui::ThemeProvider and the
+  // main way to get theme properties out of the theme provider since it's
+  // cross platform.
+  const gfx::Image* GetImageNamed(int id) const;
+
   // ui::ThemeProvider implementation.
   virtual void Init(Profile* profile) OVERRIDE;
   virtual SkBitmap* GetBitmapNamed(int id) const OVERRIDE;