Support chrome app frame colors on ChromeOS.

ash/frame/custom_frame_view_ash.h

Index: ash/frame/custom_frame_view_ash.h
diff --git a/ash/frame/custom_frame_view_ash.h b/ash/frame/custom_frame_view_ash.h
index 4abe92390382e807c86c1f830772fe39b6156c3c..b4e064dc1f6d99c8432ec14836e78f35c3621c42 100644
--- a/ash/frame/custom_frame_view_ash.h
+++ b/ash/frame/custom_frame_view_ash.h
@@ -7,6 +7,7 @@
 
 #include "ash/ash_export.h"
 #include "base/memory/scoped_ptr.h"
+#include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/window/non_client_view.h"
 
 namespace ash {
@@ -41,6 +42,10 @@ class ASH_EXPORT CustomFrameViewAsh : public views::NonClientFrameView {
   void InitImmersiveFullscreenControllerForView(
       ImmersiveFullscreenController* immersive_fullscreen_controller);
 
+  // Sets the active and inactive frame colors. Note the inactive frame color
+  // will have some transparency added when the frame is drawn.
+  void SetFrameColors(SkColor active_frame_color, SkColor inactive_frame_color);
+
   // views::NonClientFrameView:
   virtual gfx::Rect GetBoundsForClientView() const override;
   virtual gfx::Rect GetWindowBoundsForClientBounds(