Create the skeleton of a new FocusController in corewm.

This code will:
- implement the API handling focus and activation changes.
- respond to events or window disposition changes with focus and activation changes.
- dispatch focus and activation changes as events.

http://crbug.com/162100
R=sky@chromium.org
Review URL: https://codereview.chromium.org/11414090

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168882 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 15 insertions, 1 deletions

diff --git a/ui/base/events/event_constants.h b/ui/base/events/event_constants.h
index 504fd89..984b790 100644
--- a/ui/base/events/event_constants.h
+++ b/ui/base/events/event_constants.h
@@ -26,7 +26,6 @@ enum EventType {
   ET_TOUCH_STATIONARY,
   ET_TOUCH_CANCELLED,
   ET_DROP_TARGET_EVENT,
-  ET_FOCUS_CHANGE,
   ET_TRANSLATED_KEY_PRESS,
   ET_TRANSLATED_KEY_RELEASE,
 
@@ -55,6 +54,10 @@ enum EventType {
   ET_SCROLL,
   ET_SCROLL_FLING_START,
   ET_SCROLL_FLING_CANCEL,
+
+  // Must always be last. User namespace starts above this value.
+  // See ui::RegisterCustomEventType().
+  ET_LAST
 };
 
 // Event flags currently supported
diff --git a/ui/base/events/event_utils.cc b/ui/base/events/event_utils.cc
index 2d1e7af..ef16fb9e 100644
--- a/ui/base/events/event_utils.cc
+++ b/ui/base/events/event_utils.cc
@@ -8,8 +8,16 @@
 
 namespace ui {
 
+namespace {
+int g_custom_event_types = ET_LAST;
+}  // namespace
+
 bool EventCanceledDefaultHandling(const Event& event) {
   return event.phase() == EP_POSTTARGET && event.result() != ER_UNHANDLED;
 }
 
+int RegisterCustomEventType() {
+  return ++g_custom_event_types;
+}
+
 }  // namespace ui
diff --git a/ui/base/events/event_utils.h b/ui/base/events/event_utils.h
index da1d4c6..1e1240e 100644
--- a/ui/base/events/event_utils.h
+++ b/ui/base/events/event_utils.h
@@ -131,6 +131,9 @@ UI_EXPORT bool IsMouseEventFromTouch(UINT message);
 // its dispatch to its target.
 UI_EXPORT bool EventCanceledDefaultHandling(const Event& event);
 
+// Registers a custom event type.
+UI_EXPORT int RegisterCustomEventType();
+
 }  // namespace ui
 
 #endif  // UI_BASE_EVENTS_EVENT_UTILS_H_