Don't fire dblclick on disabled form control elements

As discussed here, we should apply the event blocking behavior for
disabled form controls to dblclick in addition to click, mouseup, and
mousedown:
whatwg/html#2368 (comment)

Change-Id: Ibc52585ce0704d8ba8467efc3462bd378d23fbae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5007308
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Reviewed-by: Mason Freed <masonf@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1225838}

third_party/blink/renderer/core/events/mouse_event.cc

@@ -389,7 +389,10 @@ DispatchEventResult MouseEvent::DispatchEvent(EventDispatcher& dispatcher) {
     return dispatcher.Dispatch();
 
   if (is_click || type() == event_type_names::kMousedown ||
-      type() == event_type_names::kMouseup) {
+      type() == event_type_names::kMouseup ||
+      (RuntimeEnabledFeatures::
+           DontFireDblclickOnDisabledFormControlsEnabled() &&
+       type() == event_type_names::kDblclick)) {
     GetEventPath().AdjustForDisabledFormControl();
   }
 

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1459,6 +1459,11 @@
       name: "DOMPartsAPIActivePartTracking",
       depends_on: ["DOMPartsAPI"],
     },
+    {
+      // Shipping in M121, so should be safe to remove in M126.
+      name: "DontFireDblclickOnDisabledFormControls",
+      status: "stable",
+    },
     {
       name: "EditContext",
       origin_trial_feature_name: "EditContext",

third_party/blink/web_tests/external/wpt/html/semantics/disabled-elements/disabled-event-dispatch.tentative.html

@@ -25,7 +25,7 @@
   static get formAssociated() { return true; }
 });
 
-['mousedown', 'mouseup', 'pointerdown', 'pointerup', 'click'].forEach(eventName => {
+['mousedown', 'mouseup', 'pointerdown', 'pointerup', 'click', 'dblclick'].forEach(eventName => {
   [true, false].forEach(clickChildElement => {
     for (const target of targetparent.children) {
       promise_test(async () => {
@@ -39,7 +39,18 @@
         let targetchild = target.firstElementChild;
         targetchild.addEventListener(eventName, () => childReceivedEvent = true);
 
-        await test_driver.click(clickChildElement ? targetchild : target);
+        const elementToClick = clickChildElement ? targetchild : target;
+        if (eventName === 'dblclick') {
+          await (new test_driver.Actions()
+            .pointerMove(1, 1, {origin: elementToClick})
+            .pointerDown()
+            .pointerUp()
+            .pointerDown()
+            .pointerUp())
+            .send();
+        } else {
+          await test_driver.click(elementToClick);
+        }
 
         const parentShouldReceiveEvents = eventName.startsWith('pointer');
         assert_equals(parentReceivedEvent, parentShouldReceiveEvents,