Prevent mouse from getting stuck on second display in login

ash/test/ash_test_helper.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_TEST_ASH_TEST_HELPER_H_
 #define ASH_TEST_ASH_TEST_HELPER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 
@@ skipping 15 matching lines @@
 class TestShellDelegate;
 
 // A helper class that does common initialization required for Ash. Creates a
 // root window and an ash::Shell instance with a test delegate.
 class AshTestHelper {
  public:
   explicit AshTestHelper(base::MessageLoopForUI* message_loop);
   ~AshTestHelper();
 
   // Creates the ash::Shell and performs associated initialization.
-  void SetUp();
+  // Set |start_session| to true if the user should log in before
+  // the test is run.
+  void SetUp(bool start_session);
 
   // Destroys the ash::Shell and performs associated cleanup.
   void TearDown();
 
   // Returns a RootWindow. Usually this is the active RootWindow, but that
   // method can return NULL sometimes, and in those cases, we fall back on the
   // primary RootWindow.
   aura::RootWindow* CurrentContext();
 
   void RunAllPendingInMessageLoop();
 
   base::MessageLoopForUI* message_loop() { return message_loop_; }
   TestShellDelegate* test_shell_delegate() { return test_shell_delegate_; }
 
  private:
   base::MessageLoopForUI* message_loop_;  // Not owned.
   TestShellDelegate* test_shell_delegate_;  // Owned by ash::Shell.
   scoped_ptr<ui::ScopedAnimationDurationScaleMode> zero_duration_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTestHelper);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_HELPER_H_