Extract touchscreen device management into a generic manager

ui/views/test/views_test_base.h

Index: ui/views/test/views_test_base.h
diff --git a/ui/views/test/views_test_base.h b/ui/views/test/views_test_base.h
index f689ea085381b387142c8dd35ae605ba3864c1b0..0bfa9e505cdd94411ae679b7468aa2ebfb9f0d8b 100644
--- a/ui/views/test/views_test_base.h
+++ b/ui/views/test/views_test_base.h
@@ -5,6 +5,7 @@
 #ifndef UI_VIEWS_TEST_VIEWS_TEST_BASE_H_
 #define UI_VIEWS_TEST_VIEWS_TEST_BASE_H_
 
+#include "base/at_exit.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -49,6 +50,7 @@ class ViewsTestBase : public testing::Test {
   gfx::NativeView GetContext();
 
  private:
+  base::ShadowingAtExitManager at_exit_;
   base::MessageLoopForUI message_loop_;
   scoped_ptr<TestViewsDelegate> views_delegate_;
   scoped_ptr<ViewsTestHelper> test_helper_;