cros/ash: If the partial magnifier is active, do not consume input events if over palette views.

ash/common/system/chromeos/palette/palette_tray.h

Index: ash/common/system/chromeos/palette/palette_tray.h
diff --git a/ash/common/system/chromeos/palette/palette_tray.h b/ash/common/system/chromeos/palette/palette_tray.h
index ad5dd9ecc66edda9425a804b3885bb8130a5861f..a4b929be11f0378706c2dc683a933c626429be19 100644
--- a/ash/common/system/chromeos/palette/palette_tray.h
+++ b/ash/common/system/chromeos/palette/palette_tray.h
@@ -17,6 +17,10 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 
+namespace gfx {
+class Point;
+}
+
 namespace views {
 class ImageView;
 class Widget;
@@ -65,6 +69,10 @@ class ASH_EXPORT PaletteTray : public TrayBackgroundView,
   // was opened.
   bool ShowPalette();
 
+  // Returns true if the palette tray contains the given point. This is useful
+  // for determining if an event should be propagated through to the palette.
+  bool ContainsPointInScreen(const gfx::Point& point);
+
  private:
   // views::TrayBubbleView::Delegate:
   void BubbleViewDestroyed() override;