Move chrome::HostDesktopType to ui::HostDesktopType

chrome/browser/ui/aura/active_desktop_monitor.h

Index: chrome/browser/ui/aura/active_desktop_monitor.h
diff --git a/chrome/browser/ui/aura/active_desktop_monitor.h b/chrome/browser/ui/aura/active_desktop_monitor.h
index bd33d604caf535f00f69b90398b254e8d8386b54..f9956fb4e51499ad3dfb1e91aeb1bc37951781d3 100644
--- a/chrome/browser/ui/aura/active_desktop_monitor.h
+++ b/chrome/browser/ui/aura/active_desktop_monitor.h
@@ -16,14 +16,14 @@ class ActiveDesktopMonitor : public aura::EnvObserver {
  public:
   // Constructs an ActiveDesktopMonitor which initially uses |initial_desktop|
   // as the |last_activated_desktop_| until a root window is activated.
-  explicit ActiveDesktopMonitor(chrome::HostDesktopType initial_desktop);
+  explicit ActiveDesktopMonitor(ui::HostDesktopType initial_desktop);
   ~ActiveDesktopMonitor() override;
 
   // Returns the host desktop type of the most-recently activated
   // WindowTreeHost. This desktop type may no longer exist (e.g., the Ash
   // desktop may have closed since being active, and no RWHs on the native
   // desktop have yet been activated).
-  static chrome::HostDesktopType GetLastActivatedDesktopType();
+  static ui::HostDesktopType GetLastActivatedDesktopType();
 
  private:
   // Returns true if |host| is a DesktopWindowTreeHost.
@@ -34,7 +34,7 @@ class ActiveDesktopMonitor : public aura::EnvObserver {
   void OnHostActivated(aura::WindowTreeHost* host) override;
 
   static ActiveDesktopMonitor* g_instance_;
-  chrome::HostDesktopType last_activated_desktop_;
+  ui::HostDesktopType last_activated_desktop_;
 
   DISALLOW_COPY_AND_ASSIGN(ActiveDesktopMonitor);
 };