Fixing too long running unit tests on valgrind (produced by user switch animation)

chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h

 // Copyright 2014 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 CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_
 #define CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 17 matching lines @@
   // The animation step for the user change animation.
   enum AnimationStep {
     ANIMATION_STEP_HIDE_OLD_USER,  // Hiding the old user (and shelf).
     ANIMATION_STEP_SHOW_NEW_USER,  // Show the shelf of the new user.
     ANIMATION_STEP_FINALIZE,       // All animations are done - final cleanup.
     ANIMATION_STEP_ENDED           // The animation has ended.
   };
 
   UserSwichAnimatorChromeOS(MultiUserWindowManagerChromeOS* owner,
                             const std::string& new_user_id,
-                            bool animation_disabled);
+                            int animation_speed_ms);
   ~UserSwichAnimatorChromeOS();
 
   // Check if a window is covering the entire work area of the screen it is on.
   static bool CoversScreen(aura::Window* window);
 
   bool IsAnimationFinished() {
     return animation_step_ == ANIMATION_STEP_ENDED;
   }
 
   // Returns the user id for which the wallpaper is currently shown.
@@ skipping 37 matching lines @@
   // Check if a window is maximized / fullscreen / covering the entire screen.
   // TODO(skuhne): We might want to do this on a per screen basis.
   TransitioningScreenCover GetScreenCover();
 
   // The owning window manager.
   MultiUserWindowManagerChromeOS* owner_;
 
   // The new user to set.
   std::string new_user_id_;
 
-  // If true, all animations will be suppressed.
-  bool animation_disabled_;
+  // The animation speed in ms. If 0, animations are disabled.
+  int animation_speed_ms_;
 
   // The next animation step for AdvanceUserTransitionAnimation().
   AnimationStep animation_step_;
 
   // The screen cover status before the animation has started.
   TransitioningScreenCover screen_cover_;
 
   // A timer which watches to executes the second part of a "user changed"
   // animation. Note that this timer exists only during such an animation.
   scoped_ptr<base::Timer> user_changed_animation_timer_;
 
   // For unit tests: Check which wallpaper was set.
   std::string wallpaper_user_id_;
 
   DISALLOW_COPY_AND_ASSIGN(UserSwichAnimatorChromeOS);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_