Cancel partial screenshot UI when lock happens.

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 690ae79bb696df7fe3394cbd532ad62082c3632c..e160572b8a506d389d23a6770366abd94eaac729 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -97,6 +97,12 @@ class ASH_EXPORT Shell {
     BACKWARD
   };
 
+  enum LoginStatus {

[sky, 2012/04/18 16:03:31]

Move this into it's own file so that folks don't need to include shell.h to
access it.

[Jun Mukai, 2012/04/19 06:19:25]

used system/user/login_status instead, as sadrul suggested.

+    NOT_LOGGED_IN,
+    LOGGED_IN,

[Daniel Erat, 2012/04/18 16:50:42]

It'd probably be clearer to name this LOGGED_IN_AS_USER or something similar. 
Otherwise, someone could see the LOGGED_IN value without being aware of
LOGGED_IN_AS_GUEST and figure that LOGGED_IN covered the guest case as well.

+    LOGGED_IN_AS_GUEST,
+  };

[sadrul, 2012/04/18 16:53:20]

Can you please use ash::user::LoginStatus instead? (in
ash/system/user/login_status.h)

[Jun Mukai, 2012/04/19 06:19:25]

Done.

+
   // Accesses private data from a Shell for testing.
   class ASH_EXPORT TestApi {
    public:
@@ -173,6 +179,16 @@ class ASH_EXPORT Shell {
   void SetMonitorWorkAreaInsets(aura::Window* window,
                                 const gfx::Insets& insets);
 
+  // Called when the user logs in.
+  void OnLoginStateChanged(LoginStatus status);
+
+  // Called when the application is exiting.
+  void OnAppTerminating();
+
+  // Called when the screen is locked (after the lock window is visible) or
+  // unlocked.
+  void OnLockStateChanged(bool locked);
+
   // Initializes |launcher_|.  Does nothing if it's already initialized.
   void CreateLauncher();