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..96ca75c0927f43fbda4448228d16fdc2c438e01b 100644
--- a/ash/system/palette/palette_utils.h
+++ b/ash/system/palette/palette_utils.h
@@ -14,14 +14,15 @@ class Point;
 namespace ash {
 namespace palette_utils {
 
-// Returns true if there is a stylus input device on the internal display. This
-// will return false even if there is a stylus input device until hardware
-// probing is complete (see ui::InputDeviceEventObserver).
+// Returns true if there is a stylus input device on the internal display.

[jdufault, 2017/04/26 18:50:43]

Revert this change?

[wutao, 2017/04/26 22:01:50]

Done.

 ASH_EXPORT bool HasStylusInput();

[jdufault, 2017/04/26 18:50:43]

Does this still need to be in the header?

[wutao, 2017/04/26 22:01:50]

Yes. There are multiple sites calling this.

 
 // Returns true if the palette should be shown on every display.
 ASH_EXPORT bool IsPaletteEnabledOnEveryDisplay();
 
+// Returns true if we should show palette.

[jdufault, 2017/04/26 18:50:42]

Can you be a bit more detailed in this comment, ie, what is the difference
between ShouldShowPalette and HasStylusInput?

[wutao, 2017/04/26 22:01:50]

Done.

+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);