Fix stylus tools palette.

ash/system/palette/palette_utils.h

Index: ash/system/palette/palette_utils.h
diff --git a/ash/system/palette/palette_utils.h b/ash/system/palette/palette_utils.h
index 1137f90ef9eec461662498851c188bf0e6bee427..52d179b3333272fc79b1dbaa55f9ba2d6e115efd 100644
--- a/ash/system/palette/palette_utils.h
+++ b/ash/system/palette/palette_utils.h
@@ -22,6 +22,11 @@ ASH_EXPORT bool HasStylusInput();
 // Returns true if the palette should be shown on every display.
 ASH_EXPORT bool IsPaletteEnabledOnEveryDisplay();
 
+// Returns true if the palette should be shown to the user. This happens when:
+// there is a stylus input, there is an internal display, and the user has not
+// disabled it in settings. This can be overridden by passing switches.
+ASH_EXPORT bool ShouldShowPalette();
+
 // Returns true if either the palette icon or the palette widget contain the
 // given point (in screen space).
 ASH_EXPORT bool PaletteContainsPointInScreen(const gfx::Point& point);