Made launcher hidden when kicking off chrome in app mode.

ash/wm/shelf_layout_manager.cc

Index: ash/wm/shelf_layout_manager.cc
diff --git a/ash/wm/shelf_layout_manager.cc b/ash/wm/shelf_layout_manager.cc
index 52f6b03fcedac4705922301067e4a51044a7d48d..2d3f4dc7ebe7904fbc719cd8a339ec8148f410c4 100644
--- a/ash/wm/shelf_layout_manager.cc
+++ b/ash/wm/shelf_layout_manager.cc
@@ -247,6 +247,18 @@ void ShelfLayoutManager::LayoutShelf() {
   UpdateHitTestBounds();
 }
 
+ShelfVisibilityState ShelfLayoutManager::GetShelfVisibilityState() {
+  switch(auto_hide_behavior_) {
+    case SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS:
+      return SHELF_AUTO_HIDE;
+    case SHELF_AUTO_HIDE_BEHAVIOR_NEVER:
+      return SHELF_VISIBLE;
+    case SHELF_AUTO_HIDE_ALWAYS_HIDDEN:
+      return SHELF_HIDDEN;
+  }
+  return SHELF_VISIBLE;
+}
+
 void ShelfLayoutManager::UpdateVisibilityState() {
   ShellDelegate* delegate = Shell::GetInstance()->delegate();
   if (delegate && delegate->IsScreenLocked()) {
@@ -265,14 +277,12 @@ void ShelfLayoutManager::UpdateVisibilityState() {
         break;
 
       case WORKSPACE_WINDOW_STATE_MAXIMIZED:
-          SetState(auto_hide_behavior_ == SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS ?
-                   SHELF_AUTO_HIDE : SHELF_VISIBLE);
+          SetState(GetShelfVisibilityState());
         break;
 
       case WORKSPACE_WINDOW_STATE_WINDOW_OVERLAPS_SHELF:
       case WORKSPACE_WINDOW_STATE_DEFAULT:
-        SetState(auto_hide_behavior_ == SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS ?
-                 SHELF_AUTO_HIDE : SHELF_VISIBLE);
+        SetState(GetShelfVisibilityState());
         SetWindowOverlapsShelf(window_state ==
                                WORKSPACE_WINDOW_STATE_WINDOW_OVERLAPS_SHELF);
         break;