Remove ash default frame highlighting for custom colored frames.

ash/frame/default_header_painter.h

Index: ash/frame/default_header_painter.h
diff --git a/ash/frame/default_header_painter.h b/ash/frame/default_header_painter.h
index 4c875c04978cc4d65fa992f27a85c4eb318918fd..8be189160f64e3586c8733bd32eed8cebec33525 100644
--- a/ash/frame/default_header_painter.h
+++ b/ash/frame/default_header_painter.h
@@ -85,6 +85,9 @@ class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
   // Returns the bounds for the title.
   gfx::Rect GetTitleBounds() const;
 
+  // Returns whether the frame uses custom frame coloring.
+  bool UsesCustomFrameColors() const;
+
   // Returns the frame color to use when |frame_| is inactive.
   SkColor GetInactiveFrameColor() const;