events: Update key-event handlers to not return EventResult.

ash/accelerators/accelerator_dispatcher.cc

Index: ash/accelerators/accelerator_dispatcher.cc
diff --git a/ash/accelerators/accelerator_dispatcher.cc b/ash/accelerators/accelerator_dispatcher.cc
index ee56cef5c426d5609af6e5493c9b7d5060fa19c1..41a292f6ec4c39ebe7628954e1a7e71bcf8a386a 100644
--- a/ash/accelerators/accelerator_dispatcher.cc
+++ b/ash/accelerators/accelerator_dispatcher.cc
@@ -74,8 +74,8 @@ bool AcceleratorDispatcher::Dispatch(const base::NativeEvent& event) {
     ui::EventHandler* event_rewriter =
         ash::Shell::GetInstance()->event_rewriter_filter();
     DCHECK(event_rewriter);
-    ui::EventResult result = event_rewriter->OnKeyEvent(&key_event);
-    if (result & ui::ER_CONSUMED)
+    event_rewriter->OnKeyEvent(&key_event);
+    if (key_event.stopped_propagation())
       return true;
     ash::AcceleratorController* accelerator_controller =
         ash::Shell::GetInstance()->accelerator_controller();