Rework ash::CursorManager into a corewm object, to share code with desktop.

ui/views/views.gyp

Index: ui/views/views.gyp
diff --git a/ui/views/views.gyp b/ui/views/views.gyp
index 81024839b19087f3714e061f77fac2a8bdd0b890..c6d56f058c7fad012dd6c2c23db119865af84107 100644
--- a/ui/views/views.gyp
+++ b/ui/views/views.gyp
@@ -229,6 +229,10 @@
         'corewm/compound_event_filter.h',
         'corewm/corewm_switches.cc',
         'corewm/corewm_switches.h',
+        'corewm/cursor_manager.cc',
+        'corewm/cursor_manager.h',
+        'corewm/cursor_manager_delegate.h',
+        'corewm/cursor_platform_delegate.h',
         'corewm/focus_controller.cc',
         'corewm/focus_controller.h',
         'corewm/focus_rules.h',
@@ -335,8 +339,8 @@
         'widget/default_theme_provider.h',
         'widget/desktop_aura/desktop_activation_client.cc',
         'widget/desktop_aura/desktop_activation_client.h',
-        'widget/desktop_aura/desktop_cursor_client.cc',
-        'widget/desktop_aura/desktop_cursor_client.h',
+        'widget/desktop_aura/desktop_cursor_platform_delegate.cc',
+        'widget/desktop_aura/desktop_cursor_platform_delegate.h',
         'widget/desktop_aura/desktop_dispatcher_client.cc',
         'widget/desktop_aura/desktop_dispatcher_client.h',
         'widget/desktop_aura/desktop_drag_drop_client_win.cc',
@@ -656,6 +660,7 @@
         'controls/textfield/textfield_views_model_unittest.cc',
         'controls/tree/tree_view_unittest.cc',
         'corewm/compound_event_filter_unittest.cc',
+        'corewm/cursor_manager_unittest.cc',
         'corewm/focus_controller_unittest.cc',
         'corewm/image_grid_unittest.cc',
         'corewm/input_method_event_filter_unittest.cc',