Folds methods in WmShellCommon to WmShell

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index b606869c9c2a5a498dcae72a43c86f064692f593..81660f91d555c6eb8fe734c28a6cb38cd90eb75a 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -85,9 +85,8 @@ void InitAfterFirstSessionStart() {
   // Restore focus after the user session is started.  It's needed because some
   // windows can be opened in background while login UI is still active because
   // we currently restore browser windows before login UI is deleted.
-  ash::Shell* shell = ash::Shell::GetInstance();
   aura::Window::Windows mru_list = ash::WmWindowAura::ToAuraWindows(
-      shell->mru_window_tracker()->BuildMruWindowList());
+      ash::WmShell::Get()->mru_window_tracker()->BuildMruWindowList());
   if (!mru_list.empty())
     mru_list.front()->Focus();