Minimized windows should not be activated by another user in multiprofile scenario.

ash/session/session_state_delegate.h

Index: ash/session/session_state_delegate.h
diff --git a/ash/session/session_state_delegate.h b/ash/session/session_state_delegate.h
index e3b2dc4e6960f354640464d2f27607fac452d506..752ff56d2fb4d65ab688253b1b8b8c128d99e8b0 100644
--- a/ash/session/session_state_delegate.h
+++ b/ash/session/session_state_delegate.h
@@ -81,6 +81,10 @@ class ASH_EXPORT SessionStateDelegate {
   virtual content::BrowserContext* GetBrowserContextForWindow(
       aura::Window* window) = 0;
 
+  // Returns the user on which the window is currently shown. An empty string
+  // means the window will be shown for every user.
+  virtual const std::string& GetUserPresentingWindow(aura::Window* window) = 0;

[oshima, 2015/04/07 19:53:44]

Is it hard to return BrowserContext instead of std::string?

[xdai1, 2015/04/09 17:22:40]

Done.

+
   // Returns the maximum possible number of logged in users.
   virtual int GetMaximumNumberOfLoggedInUsers() const = 0;