Split Shell::ToggleAppList() into ShowAppList and DismissAppList.

ash/first_run/first_run_helper_impl.cc

Index: ash/first_run/first_run_helper_impl.cc
diff --git a/ash/first_run/first_run_helper_impl.cc b/ash/first_run/first_run_helper_impl.cc
index e5e335db84f4ff98413ec393e70275d0a0b3ebe7..62692a5b009fc958617982d4e28ff46f5df59ea4 100644
--- a/ash/first_run/first_run_helper_impl.cc
+++ b/ash/first_run/first_run_helper_impl.cc
@@ -51,15 +51,11 @@ views::Widget* FirstRunHelperImpl::GetOverlayWidget() {
 }
 
 void FirstRunHelperImpl::OpenAppList() {
-  if (Shell::GetInstance()->GetAppListTargetVisibility())
-    return;
-  Shell::GetInstance()->ToggleAppList(NULL);
+  Shell::GetInstance()->ShowAppList(NULL);
 }
 
 void FirstRunHelperImpl::CloseAppList() {
-  if (!Shell::GetInstance()->GetAppListTargetVisibility())
-    return;
-  Shell::GetInstance()->ToggleAppList(NULL);
+  Shell::GetInstance()->DismissAppList();
 }
 
 gfx::Rect FirstRunHelperImpl::GetLauncherBounds() {