Adding UMA statistics for multi profile

ash/multi_profile_uma.h

 // Copyright 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_MULTI_PROFILE_UMA_H_
 #define ASH_MULTI_PROFILE_UMA_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 
 namespace ash {
 
 // Records UMA statistics for multiprofile actions.
 // Note: There is also an action to switch profile windows from the
 // browser frame that is recorded by the "Profile.OpenMethod" metric.
 class ASH_EXPORT MultiProfileUMA {
  public:
   // Keep these enums up to date with tools/metrics/histograms/histograms.xml.
-  enum SwitchActiveUserAction {
-    SWITCH_ACTIVE_USER_BY_TRAY = 0,
-    SWITCH_ACTIVE_USER_BY_ACCELERATOR,
-    NUM_SWITCH_ACTIVE_USER_ACTIONS
+  enum SessionMode {
+    SESSION_SINGLE_USER_MODE = 0,
+    SESSION_SIDE_BY_SIDE_MODE,
+    SESSION_SEPARATE_DESKTOP_MODE,
+    NUM_SESSION_MODES
   };
 
   enum SigninUserAction {
     SIGNIN_USER_BY_TRAY = 0,
     SIGNIN_USER_BY_BROWSER_FRAME,
     NUM_SIGNIN_USER_ACTIONS
   };
 
+  enum SwitchActiveUserAction {
+    SWITCH_ACTIVE_USER_BY_TRAY = 0,
+    SWITCH_ACTIVE_USER_BY_ACCELERATOR,
+    NUM_SWITCH_ACTIVE_USER_ACTIONS
+  };
+
+  enum TeleportWindowAction {
+    TELEPORT_WINDOW_DRAG_AND_DROP = 0,
+    TELEPORT_WINDOW_CAPTION_MENU,
+    TELEPORT_WINDOW_RETURN_BY_MINIMIZE,
+    TELEPORT_WINDOW_RETURN_BY_LAUNCHER,
+    NUM_TELEPORT_WINDOW_ACTIONS
+  };
+
+  // Record the type of user (multi profile) session.
+  static void RecordSessionMode(SessionMode mode);
+
+  // Record signing in a new user and what UI path was taken.
+  static void RecordSigninUser(SigninUserAction action);
+
   // Record switching the active user and what UI path was taken.
   static void RecordSwitchActiveUser(SwitchActiveUserAction action);
 
-  // Record signing in a new user and what UI path was taken.
-  static void RecordSigninUser(SigninUserAction action);
+  // Record the way and how many times a window got teleported to another desk.
+  static void RecordTeleportAction(TeleportWindowAction action);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(MultiProfileUMA);
 };
 
 }  // namespace ash
 
 #endif  // ASH_MULTI_PROFILE_UMA_H_