Allow setting different hit test bounds overrides for mouse and touch

ash/wm/wm_types.h

Index: ash/wm/wm_types.h
diff --git a/ash/wm/wm_types.h b/ash/wm/wm_types.h
index da3db00bde1c99937cc3ef655a9a2a04951a268d..f807589e786134e33840ee2913a27c74449b9287 100644
--- a/ash/wm/wm_types.h
+++ b/ash/wm/wm_types.h
@@ -46,7 +46,31 @@ enum WindowShowType {
 WindowShowType ToWindowShowType(ui::WindowShowState state);
 ui::WindowShowState ToWindowShowState(WindowShowType type);
 
-}  // namespace
-}  // namespace
+// This enum defines the types of fullscreen. It is only relevant when
+// WindowShowType == SHOW_TYPE_FULLSCREEN.
+enum FullscreenType {
+  // - Light bars are used instead of regular tabs when the top-of-window views
+  // are hidden. The user can reveal the top-of-window views by hovering the
+  // mouse at top of the screen.
+  // - The shelf is forced to auto hide.
+  FULLSCREEN_TYPE_IMMERSIVE_MINIMAL_CHROME,
+
+  // - The tab strip is hidden when the top-of-window views are hidden. The
+  //   user can reveal the top-of-window views by hovering the
+  //   mouse at the top of the screen.
+  // - The shelf is completely hidden and cannot be revealed.
+  FULLSCREEN_TYPE_IMMERSIVE_NO_CHROME,
+
+  // - The tab strip is hidden and the top-of-window views cannot be revealed.
+  // - The shelf is completely hidden and cannot be revealed.
+  // - There may be a bubble which slides out when the user hovers the mouse at
+  //   top of the screen.
+  FULLSCREEN_TYPE_OTHER,
+
+  FULLSCREEN_TYPE_DEFAULT = FULLSCREEN_TYPE_OTHER
+};
+
+}  // namespace wm
+}  // namespace ash
 
 #endif  // ASH_WM_WM_TYPES_H_