Replace kIgnoreSoloWindowFramePointerPolicy with global flag

ash/wm/frame_painter.h

Index: ash/wm/frame_painter.h
diff --git a/ash/wm/frame_painter.h b/ash/wm/frame_painter.h
index 1f41c8ce333973c45d6da37db2dcdf2a33967e0f..309b82ef07840b5305351e0620d242f2d552a05f 100644
--- a/ash/wm/frame_painter.h
+++ b/ash/wm/frame_painter.h
@@ -72,6 +72,9 @@ class ASH_EXPORT FramePainter : public aura::WindowObserver,
             views::View* window_icon,
             FrameCaptionButtonContainerView* caption_button_container);
 
+  // Enable/Disable the solo-wnidow transparent header appearance.

[James Cook, 2013/09/04 18:25:21]

wnidow -> window

optional: Maybe "appearance feature"?  Or something to help reinforce that it's
not just setting it for one window, but turning the feature off for all
windows/root windows?

optional: Maybe call the function SetSoloWindowHeader*s*Enabled() ?

[oshima, 2013/09/04 18:30:56]

done
changed to "appearance feature"
 
done

+  static void SetSoloWindowHeaderEnabled(bool enabled);
+
   // Updates the solo-window transparent header appearance for all windows
   // using frame painters in |root_window|.
   static void UpdateSoloWindowHeader(aura::RootWindow* root_window);