ozone: evdev: Release pressed keys when event filtering starts

This prevents filtering out key release events, resulting in stuck keys.

BUG=449162
TEST=Fully rotate glimmer while holding spacebar. No spurious
  key repeats.

Review URL: https://codereview.chromium.org/958403003

Cr-Commit-Position: refs/heads/master@{#318535}

ui/events/ozone/evdev/input_controller_evdev.cc

@@ -96,6 +96,9 @@ void InputControllerEvdev::DisableInternalKeyboardExceptKeys(
   if (input_device_factory_) {
     input_device_factory_->DisableInternalKeyboardExceptKeys(
         excepted_keys.Pass());
+
+    // Release keys since we may block key up events.
+    keyboard_->Reset();
   }
 }
 

ui/events/ozone/evdev/keyboard_evdev.cc

@@ -82,6 +82,11 @@ void KeyboardEvdev::OnKeyChange(unsigned int key,
   DispatchKey(key, down, false /* repeat */, timestamp);
 }
 
+void KeyboardEvdev::Reset() {
+  for (int key = 0; key < KEY_CNT; ++key)
+    OnKeyChange(key, false /* down */, ui::EventTimeForNow());
+}
+
 void KeyboardEvdev::SetCapsLockEnabled(bool enabled) {
   modifiers_->SetModifierLock(EVDEV_MODIFIER_CAPS_LOCK, enabled);
 }

ui/events/ozone/evdev/keyboard_evdev.h

@@ -36,6 +36,9 @@ class EVENTS_OZONE_EVDEV_EXPORT KeyboardEvdev {
   // Handlers for raw key presses & releases.
   void OnKeyChange(unsigned int code, bool down, base::TimeDelta timestamp);
 
+  // Release all pressed keys.
+  void Reset();
+
   // Handle Caps Lock modifier.
   void SetCapsLockEnabled(bool enabled);
   bool IsCapsLockEnabled();