Remove ExtractImageRep from the browser frame header painting code.

ui/gfx/canvas.h

Index: ui/gfx/canvas.h
diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index 4fcb4bcfbdfe563610198d12239de0f6e12ec6e4..d4ff14e2f18c80a058e6da9067420b47b58d5cc3 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -192,6 +192,10 @@ class GFX_EXPORT Canvas {
   void SaveLayerAlpha(uint8_t alpha);
   void SaveLayerAlpha(uint8_t alpha, const Rect& layer_bounds);
 
+  // Like SaveLayerAlpha but draws the layer with an arbitrary set of
+  // PaintFlags once Restore() is called.
+  void SaveLayerWithFlags(const cc::PaintFlags& flags);
+
   // Restores the drawing state after a call to Save*(). It is an error to
   // call Restore() more times than Save*().
   void Restore();