PlatformEventDispatcher::DispatchEvent() should return a PostDispatchAction

ui/wm/core/nested_accelerator_dispatcher_linux.cc

Index: ui/wm/core/nested_accelerator_dispatcher_linux.cc
diff --git a/ui/wm/core/nested_accelerator_dispatcher_linux.cc b/ui/wm/core/nested_accelerator_dispatcher_linux.cc
index ee5b587225cf6149e8bbe5b0301a911240102e4e..5ccc51161c10c43bb259931792fdb0f48db2ced0 100644
--- a/ui/wm/core/nested_accelerator_dispatcher_linux.cc
+++ b/ui/wm/core/nested_accelerator_dispatcher_linux.cc
@@ -64,7 +64,8 @@ class NestedAcceleratorDispatcherLinux : public NestedAcceleratorDispatcher,
     return true;
   }
 
-  virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) override {
+  virtual ui::PostDispatchAction DispatchEvent(
+      const ui::PlatformEvent& event) override {
     if (IsKeyEvent(event)) {
       ui::KeyEvent key_event(event);
       ui::Accelerator accelerator = CreateAcceleratorFromKeyEvent(key_event);