Add EF_IS_REPEAT flag to KeyEvent to handle repeated accelerators correctly.

ui/wm/core/accelerator_filter.cc

Index: ui/wm/core/accelerator_filter.cc
diff --git a/ui/wm/core/accelerator_filter.cc b/ui/wm/core/accelerator_filter.cc
index 7993cd74a00a9ed518d51890bc4bce51b3f15939..57997134dd084c1edd02d0596cdb6d16f923002a 100644
--- a/ui/wm/core/accelerator_filter.cc
+++ b/ui/wm/core/accelerator_filter.cc
@@ -60,8 +60,7 @@ void AcceleratorFilter::OnKeyEvent(ui::KeyEvent* event) {
   ui::Accelerator accelerator(event->key_code(),
                               event->flags() & kModifierFlagMask);
   accelerator.set_type(event->type());
-
-  delegate_->PreProcessAccelerator(accelerator);
+  accelerator.set_is_repeat(event->IsRepeat());
 
   // Handle special hardware keys like brightness and volume. However, some
   // windows can override this behavior (e.g. Chrome v1 apps by default and