Allow setting different hit test bounds overrides for mouse and touch

ash/ash_switches.cc

Index: ash/ash_switches.cc
diff --git a/ash/ash_switches.cc b/ash/ash_switches.cc
index 70b1340b289bb486211e3f93c7a771bf72fedb77..04dd011c8f8757c705f40e739e87e4301b5a63c4 100644
--- a/ash/ash_switches.cc
+++ b/ash/ash_switches.cc
@@ -148,11 +148,6 @@ const char kAshHideNotificationsForFactory[] =
 // "1024x768*2" sets the scale factor to 2 for a high DPI display.
 const char kAshHostWindowBounds[] = "ash-host-window-bounds";
 
-// Hides the small tab indicators at the top of the screen during immersive
-// fullscreen mode.
-const char kAshImmersiveHideTabIndicators[] =
-    "ash-immersive-hide-tab-indicators";
-
 // OEM-supplied wallpaper (as paths to trusted, non-user-writable JPEG files).
 const char kAshOemWallpaperLarge[] = "ash-oem-wallpaper-large";
 const char kAshOemWallpaperSmall[] = "ash-oem-wallpaper-small";