Fix the issue of cursor's device scale factor when using monitors with differnt device scale factor.

ash/ash.gyp

Index: ash/ash.gyp
diff --git a/ash/ash.gyp b/ash/ash.gyp
index 08cf90b1531ed6e66c54833a0eec7f305236534d..cbc94a82ce29eea9944c53d2bb3fb3498b564f91 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -435,6 +435,37 @@
       ],
     },
     {
+      'target_name': 'test_support_ash',
+      'type': 'static_library',
+      'dependencies': [
+        '../skia/skia.gyp:skia',
+        '../testing/gtest.gyp:gtest',
+        'ash',
+        'ash_resources',
+      ],
+      'sources': [
+        'test/ash_test_base.cc',
+        'test/ash_test_base.h',
+        'test/ash_unittests.cc',
+        'test/capture_tracking_view.cc',
+        'test/capture_tracking_view.h',
+        'test/cursor_manager_test_api.cc',
+        'test/cursor_manager_test_api.h',
+        'test/launcher_view_test_api.cc',
+        'test/launcher_view_test_api.h',
+        'test/test_activation_delegate.cc',
+        'test/test_activation_delegate.h',
+        'test/test_launcher_delegate.cc',
+        'test/test_launcher_delegate.h',
+        'test/test_shell_delegate.cc',
+        'test/test_shell_delegate.h',
+        'test/test_suite.cc',
+        'test/test_suite.h',
+        'test/test_suite_init.h',
+        'test/test_suite_init.mm',
+      ],
+    },
+    {
       'target_name': 'ash_unittests',
       'type': 'executable',
       'dependencies': [
@@ -461,6 +492,7 @@
         '../ui/views/views.gyp:test_support_views',
         'ash',
         'ash_resources',
+        'test_support_ash',
       ],
       'sources': [
         '../ui/views/test/test_views_delegate.cc',
@@ -501,25 +533,6 @@
         'shell/window_watcher_unittest.cc',
         'system/tray/system_tray_unittest.cc',
         'system/web_notification/web_notification_tray_unittest.cc',
-        'test/ash_test_base.cc',
-        'test/ash_test_base.h',
-        'test/ash_unittests.cc',
-        'test/capture_tracking_view.cc',
-        'test/capture_tracking_view.h',
-        'test/cursor_manager_test_api.cc',
-        'test/cursor_manager_test_api.h',
-        'test/launcher_view_test_api.cc',
-        'test/launcher_view_test_api.h',
-        'test/test_activation_delegate.cc',
-        'test/test_activation_delegate.h',
-        'test/test_launcher_delegate.cc',
-        'test/test_launcher_delegate.h',
-        'test/test_shell_delegate.cc',
-        'test/test_shell_delegate.h',
-        'test/test_suite.cc',
-        'test/test_suite.h',
-        'test/test_suite_init.h',
-        'test/test_suite_init.mm',
         'tooltips/tooltip_controller_unittest.cc',
         'wm/activation_controller_unittest.cc',
         'wm/base_layout_manager_unittest.cc',