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

ash/session/session_state_delegate.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_SESSION_SESSION_STATE_DELEGATE_H_
 #define ASH_SESSION_SESSION_STATE_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 63 matching lines @@
   virtual ~SessionStateDelegate() {};
 
   // Returns the browser context for the user given by |index|.
   virtual content::BrowserContext* GetBrowserContextByIndex(
       MultiProfileIndex index) = 0;
 
   // Returns the browser context associated with the window.
   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;
 
   // Returns the number of signed in users. If 0 is returned, there is either
   // no session in progress or no active user.
   virtual int NumberOfLoggedInUsers() const = 0;
 
   // Returns true if there is possible to add more users to multiprofile
   // session. Error is stored in |error| if it is not NULL and function
   // returned false.
@@ skipping 57 matching lines @@
   // Adds or removes sessions state observer.
   virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0;
   virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0;
 
   bool IsInSecondaryLoginScreen() const;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SESSION_SESSION_STATE_DELEGATE_H_