[SPEAK-ON-MUTE] Add speak-on-mute notification toast UI.

Pop up a toast when speak-on-mute is detected.

UI review: go/vc-ui
TEST: manually test on DUT.

Bug: b/253283711
Change-Id: I5b2d33d7d93ac34fba950b9e43b3f6cf16e346a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4151359
Reviewed-by: Andre Le <leandre@chromium.org>
Commit-Queue: CJ Huang <chenjih@google.com>
Auto-Submit: CJ Huang <chenjih@google.com>
Cr-Commit-Position: refs/heads/main@{#1093591}

ash/ash_strings.grd

@@ -1487,6 +1487,9 @@ Style notes:
       <message name="IDS_ASH_VIDEO_CONFERENCE_BUBBLE_PORTRAIT_RELIGHT_NAME" desc="Text for name of the portrait relight effect in the VC bubble.">
         Portrait Relighting
       </message>
+      <message name="IDS_ASH_VIDEO_CONFERENCE_TOAST_SPEAK_ON_MUTE_DETECTED" desc="A toast message that we show when user tries to speak while muted on system-level.">
+        Are you speaking? You are on mute. Learn more
+      </message>
 
       <!-- Phone Hub tray-->
       <message name="IDS_ASH_PHONE_HUB_TRAY_ACCESSIBLE_NAME" desc="The accessible name of the Phone Hub tray bubble for screen readers.">

ash/ash_strings_grd/IDS_ASH_VIDEO_CONFERENCE_TOAST_SPEAK_ON_MUTE_DETECTED.png.sha1

@@ -0,0 +1 @@
+0f23ba722725e7528fe3f608f9a3dfe6de45d5ea

ash/constants/notifier_catalogs.h

@@ -242,7 +242,8 @@ enum class ToastCatalogName {
   kEcheTrayTabletModeNotSupported = 38,
   kNotificationCenterTrayNoNotifications = 39,
   kCopyToClipboardAction = 40,
-  kMaxValue = kCopyToClipboardAction,
+  kVideoConferenceTraySpeakOnMuteDetected = 41,
+  kMaxValue = kVideoConferenceTraySpeakOnMuteDetected,
 };
 
 }  // namespace ash

ash/system/video_conference/video_conference_tray_controller.cc

@@ -4,8 +4,12 @@
 
 #include "ash/system/video_conference/video_conference_tray_controller.h"
 
+#include "ash/constants/notifier_catalogs.h"
+#include "ash/public/cpp/system/toast_data.h"
+#include "ash/public/cpp/system/toast_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
+#include "ash/strings/grit/ash_strings.h"
 #include "ash/style/icon_button.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/video_conference/video_conference_media_state.h"
@@ -14,10 +18,18 @@
 #include "chromeos/crosapi/mojom/video_conference.mojom.h"
 #include "media/capture/video/chromeos/camera_hal_dispatcher_impl.h"
 #include "media/capture/video/chromeos/mojom/cros_camera_service.mojom-shared.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace ash {
 
 namespace {
+// The ID for the "Speak-on-mute detected" toast.
+constexpr char kVideoConferenceTraySpeakOnMuteDetectedId[] =
+    "video_conference_tray_toast_ids.speak_on_mute_detected";
+
+// The cool down duration for speak-on-mute detection notification in seconds.
+constexpr int KSpeakOnMuteNotificationCoolDownDuration = 60;
+
 VideoConferenceTrayController* g_controller_instance = nullptr;
 }  // namespace
 
@@ -81,6 +93,26 @@ void VideoConferenceTrayController::OnInputMuteChanged(
   }
 }
 
+void VideoConferenceTrayController::OnSpeakOnMuteDetected() {
+  const base::TimeTicks current_time = base::TimeTicks::Now();
+
+  if (!last_speak_on_mute_notification_time_.has_value() ||
+      (current_time - last_speak_on_mute_notification_time_.value())
+              .InSeconds() >= KSpeakOnMuteNotificationCoolDownDuration) {
+    ToastData toast_data(
+        kVideoConferenceTraySpeakOnMuteDetectedId,
+        ToastCatalogName::kVideoConferenceTraySpeakOnMuteDetected,
+        l10n_util::GetStringUTF16(
+            IDS_ASH_VIDEO_CONFERENCE_TOAST_SPEAK_ON_MUTE_DETECTED),
+        ToastData::kDefaultToastDuration,
+        /*visible_on_lock_screen=*/false);
+    toast_data.show_on_all_root_windows = true;
+    ToastManager::Get()->Show(std::move(toast_data));
+
+    last_speak_on_mute_notification_time_.emplace(current_time);
+  }
+}
+
 void VideoConferenceTrayController::UpdateWithMediaState(
     VideoConferenceMediaState state) {
   auto old_state = state_;
@@ -128,4 +160,4 @@ void VideoConferenceTrayController::HandleDeviceUsedWhileDisabled(
   // TODO(b/249828245): Implement logic to handle this.
 }
 
-}  // namespace ash
+}  // namespace ash

ash/system/video_conference/video_conference_tray_controller.h

@@ -9,6 +9,7 @@
 #include "ash/system/video_conference/effects/video_conference_tray_effects_manager.h"
 #include "ash/system/video_conference/video_conference_media_state.h"
 #include "base/observer_list_types.h"
+#include "base/time/time.h"
 #include "chromeos/ash/components/audio/cras_audio_handler.h"
 #include "chromeos/crosapi/mojom/video_conference.mojom-forward.h"
 #include "media/capture/video/chromeos/camera_hal_dispatcher_impl.h"
@@ -93,6 +94,10 @@ class ASH_EXPORT VideoConferenceTrayController
       bool mute_on,
       CrasAudioHandler::InputMuteChangeMethod method) override;
 
+  // CrasAudioHandler::AudioObserver:
+  // Pop up a toast when speaking on mute is detected.
+  void OnSpeakOnMuteDetected() override;
+
   VideoConferenceTrayEffectsManager& effects_manager() {
     return effects_manager_;
   }
@@ -107,8 +112,11 @@ class ASH_EXPORT VideoConferenceTrayController
 
   // Registered observers.
   base::ObserverList<Observer> observer_list_;
+
+  // The last time speak-on-mute notification showed.
+  absl::optional<base::TimeTicks> last_speak_on_mute_notification_time_;
 };
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_VIDEO_CONFERENCE_VIDEO_CONFERENCE_TRAY_CONTROLLER_H_
+#endif  // ASH_SYSTEM_VIDEO_CONFERENCE_VIDEO_CONFERENCE_TRAY_CONTROLLER_H_