Revert: Web: don't wait for polling when sending events

This is a breaking change, thus revert it for patch series.

src/changelog/unreleased.md

@@ -40,11 +40,6 @@ changelog entry.
 
 ## Unreleased
 
-### Changed
-
-- On Web, let events wake up event loop immediately when using
-  `ControlFlow::Poll`.
-
 ### Fixed
 
 - On Web, fix `EventLoopProxy::send_event()` triggering event loop immediately

src/platform_impl/web/event_loop/runner.rs

@@ -476,9 +476,11 @@ impl Shared {
 
         if local {
             // If the loop is not running and triggered locally, queue on next microtick.
-            if let Ok(RunnerEnum::Running(_)) =
+            if let Ok(RunnerEnum::Running(ref runner)) =
                 self.0.runner.try_borrow().as_ref().map(Deref::deref)
             {
+                // If we're currently polling let `send_events` do its job.
+                if !matches!(runner.state, State::Poll { .. }) {
                     #[wasm_bindgen]
                     extern "C" {
                         #[wasm_bindgen(js_name = queueMicrotask)]
@@ -502,6 +504,7 @@ impl Shared {
                     return;
                 }
             }
+        }
 
         self.send_events(iter::repeat(Event::UserEvent(())).take(count.get()))
     }
@@ -517,8 +520,13 @@ impl Shared {
         // If we can run the event processing right now, or need to queue this and wait for later
         let mut process_immediately = true;
         match self.0.runner.try_borrow().as_ref().map(Deref::deref) {
-            // If the runner is attached but not running, we always wake it up.
+            Ok(RunnerEnum::Running(ref runner)) => {
-            Ok(RunnerEnum::Running(_)) => (),
+                // If we're currently polling, queue this and wait for the poll() method to be
+                // called.
+                if let State::Poll { .. } = runner.state {
+                    process_immediately = false;
+                }
+            },
             Ok(RunnerEnum::Pending) => {
                 // The runner still hasn't been attached: queue this event and wait for it to be
                 process_immediately = false;