Add Mojo API for Blink hit testing

content/renderer/input/frame_input_handler_impl.cc

Index: content/renderer/input/frame_input_handler_impl.cc
diff --git a/content/renderer/input/frame_input_handler_impl.cc b/content/renderer/input/frame_input_handler_impl.cc
index ba35f6574d5a602fdc7270fc255dbd0a795eb833..34f2be46d90675c427b620a037479413305790a7 100644
--- a/content/renderer/input/frame_input_handler_impl.cc
+++ b/content/renderer/input/frame_input_handler_impl.cc
@@ -55,11 +55,11 @@ void FrameInputHandlerImpl::CreateMojoService(
   new FrameInputHandlerImpl(render_frame, std::move(request));
 }
 
-void FrameInputHandlerImpl::RunOnMainThread(const base::Closure& closure) {
+void FrameInputHandlerImpl::RunOnMainThread(base::OnceClosure closure) {
   if (input_event_queue_) {
-    input_event_queue_->QueueClosure(closure);
+    input_event_queue_->QueueClosure(std::move(closure));
   } else {
-    closure.Run();
+    std::move(closure).Run();
   }
 }