touch: Return an enum from OnTouchEvent.

views/widget/root_view.cc

Index: views/widget/root_view.cc
diff --git a/views/widget/root_view.cc b/views/widget/root_view.cc
index 143b23ad99429c1d19b454c8fb86a5ba6b69c822..2ad45ea6c1e165ea1536fc030344c1e618020b05 100644
--- a/views/widget/root_view.cc
+++ b/views/widget/root_view.cc
@@ -287,7 +287,7 @@ void RootView::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
     }
 
 #if defined(TOUCH_UI)
-    if (touch_pressed_handler_) {
+    if (touch_pressed_handler_ == child) {
       touch_pressed_handler_ = NULL;
     }
 #endif
@@ -347,6 +347,7 @@ bool RootView::OnTouchEvent(const TouchEvent& e) {
     // return true, which will cause subsequent drag/release events to get
     // forwarded to that view.
     if (handled) {
+      touch_pressed_handler_->set_touch_event_observer(this);
       gesture_manager_->ProcessTouchEventForGesture(e, this, handled);
       return true;
     }
@@ -359,7 +360,13 @@ bool RootView::OnTouchEvent(const TouchEvent& e) {
   gesture_manager_->ProcessTouchEventForGesture(e, this, handled);
   return handled;
 }
-#endif
+
+void RootView::OnTouchSequenceEnd() {
+  DCHECK(touch_pressed_handler_);
+  touch_pressed_handler_ = NULL;
+}
+
+#endif  // defined(TOUCH_UI)
 
 bool RootView::OnMousePressed(const MouseEvent& e) {
   // This function does not normally handle non-client messages except for