Reland "GMC: Redesign audio picker UI"

This is a reland of 7d2d8cc1

Original change's description:
> GMC: Redesign audio picker UI
> 
> Implement the new UI for the audio device picker in global media
> controls. As part of this change, the MediaNotificationBackground will
> draw a gradient between the device picker and notification artwork if
> the picker is availabile.
> 
> Screenshots of this updated UI will be posted on the crbug.
> 
> Change-Id: Ic7186c770102663b08e85b56eeddfbfa13833c3c
> Bug: 1117160
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2358512
> Commit-Queue: Noah Rose Ledesma <noahrose@google.com>
> Reviewed-by: Tommy Steimel <steimel@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#800243}

Bug: 1117160
Change-Id: I3adf5e58dcb8cd77758abd75aa5d497ab0f50c2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368504Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Noah Rose Ledesma <noahrose@google.com>
Cr-Commit-Position: refs/heads/master@{#800781}

chrome/app/chromium_strings.grd

@@ -1167,6 +1167,12 @@ Chromium is unable to recover your settings.
         </message>
       </if>
 
+      <!-- Global Media Controls -->
+      <if expr="not is_android">
+        <message name="IDS_GLOBAL_MEDIA_CONTROLS_DEVICES_BUTTON_LABEL" desc="Label for a button that opens a menu for picking an audio device to play from.">
+          Devices
+        </message>
+      </if>
     </messages>
   </release>
 </grit>

chrome/app/chromium_strings_grd/IDS_GLOBAL_MEDIA_CONTROLS_DEVICES_BUTTON_LABEL.png.sha1

+768895d5a9d7cb3c5816e91af22e01b359eb646f
\ No newline at end of file

chrome/browser/ui/views/global_media_controls/media_notification_audio_device_selector_view.h

@@ -11,9 +11,9 @@
 #include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/layout/box_layout.h"
 
-namespace views {
-class Button;
-}  // namespace views
+namespace {
+class AudioDeviceEntryView;
+}  // anonymous namespace
 
 class MediaNotificationAudioDeviceSelectorViewDelegate;
 class MediaNotificationService;
@@ -24,27 +24,30 @@ class MediaNotificationAudioDeviceSelectorView : public views::View,
   MediaNotificationAudioDeviceSelectorView(
       MediaNotificationAudioDeviceSelectorViewDelegate* delegate,
       MediaNotificationService* service,
-      gfx::Size size,
-      const std::string& current_device_id);
-  MediaNotificationAudioDeviceSelectorView(
-      const MediaNotificationAudioDeviceSelectorView&) = delete;
-  MediaNotificationAudioDeviceSelectorView& operator=(
-      const MediaNotificationAudioDeviceSelectorView&) = delete;
+      const std::string& current_device_id,
+      const SkColor& foreground_color,
+      const SkColor& background_color);
   ~MediaNotificationAudioDeviceSelectorView() override;
 
   // Called when audio output devices are discovered.
   void UpdateAvailableAudioDevices(
       const media::AudioDeviceDescriptions& device_descriptions);
-
   // Called when an audio device switch has occurred
-  void UpdateCurrentAudioDevice(std::string current_device_id);
+  void UpdateCurrentAudioDevice(const std::string& current_device_id);
+  void OnColorsChanged(const SkColor& foreground_color,
+                       const SkColor& background_color);
 
-  // views::ButtonListener
+  // ButtonListener
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
+  static std::string get_entry_label_for_testing(views::View* entry_view);
+  static bool get_entry_is_highlighted_for_testing(views::View* entry_view);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaNotificationAudioDeviceSelectorViewTest,
                            DeviceButtonsCreated);
+  FRIEND_TEST_ALL_PREFIXES(MediaNotificationAudioDeviceSelectorViewTest,
+                           ExpandButtonOpensEntryContainer);
   FRIEND_TEST_ALL_PREFIXES(MediaNotificationAudioDeviceSelectorViewTest,
                            DeviceButtonClickNotifiesContainer);
   FRIEND_TEST_ALL_PREFIXES(MediaNotificationAudioDeviceSelectorViewTest,
@@ -54,31 +57,27 @@ class MediaNotificationAudioDeviceSelectorView : public views::View,
   FRIEND_TEST_ALL_PREFIXES(MediaNotificationAudioDeviceSelectorViewTest,
                            DeviceButtonsChange);
 
-  void CreateDeviceButton(
-      const media::AudioDeviceDescription& device_description);
-
   bool ShouldBeVisible(
       const media::AudioDeviceDescriptions& device_descriptions);
 
+  void ShowDevices();
+  void HideDevices();
+
+  bool is_expanded_ = false;
   MediaNotificationAudioDeviceSelectorViewDelegate* const delegate_;
-  MediaNotificationService* const service_;
+  std::string current_device_id_;
+  SkColor foreground_color_, background_color_;
+  AudioDeviceEntryView* current_device_entry_view_ = nullptr;
+
+  // Child views
+  views::View* expand_button_strip_;
+  views::LabelButton* expand_button_;
+  views::View* audio_device_entries_container_;
 
   std::unique_ptr<MediaNotificationDeviceProvider::
                       GetOutputDevicesCallbackList::Subscription>
       audio_device_subscription_;
 
-  // Subviews
-  views::View* device_button_container_ = nullptr;
-
-  views::View* expand_button_container_ = nullptr;
-  views::ToggleImageButton* expand_button_ = nullptr;
-
-  views::MdTextButton* current_device_button_ = nullptr;
-  std::string current_device_id_;
-
-  // Maps button pointers to the string ID of the audio sink they represent.
-  std::map<views::Button*, std::string> sink_id_map_;
-
   base::WeakPtrFactory<MediaNotificationAudioDeviceSelectorView>
       weak_ptr_factory_{this};
 };

chrome/browser/ui/views/global_media_controls/media_notification_audio_device_selector_view_unittest.cc

@@ -3,10 +3,10 @@
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/global_media_controls/media_notification_audio_device_selector_view.h"
-#include <memory>
 
-#include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
+#include "base/util/ranges/algorithm.h"
 #include "chrome/browser/media/router/media_router_factory.h"
 #include "chrome/browser/media/router/test/mock_media_router.h"
 #include "chrome/browser/ui/global_media_controls/media_notification_device_provider.h"
@@ -16,8 +16,7 @@
 #include "chrome/test/views/chrome_views_test_base.h"
 #include "media/audio/audio_device_description.h"
 #include "ui/events/base_event_utils.h"
-#include "ui/views/controls/button/label_button.h"
-#include "ui/views/controls/button/md_text_button.h"
+#include "ui/gfx/color_palette.h"
 
 class MediaNotificationContainerObserver;
 
@@ -93,6 +92,23 @@ class MediaNotificationAudioDeviceSelectorViewTest
     ChromeViewsTestBase::TearDown();
   }
 
+  void SimulateButtonClick(views::View* view) {
+    view_->ButtonPressed(
+        static_cast<views::Button*>(view),
+        ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
+                       ui::EventTimeForNow(), 0, 0));
+  }
+
+  static std::string EntryLabelText(views::View* entry_view) {
+    return MediaNotificationAudioDeviceSelectorView::
+        get_entry_label_for_testing(entry_view);
+  }
+
+  static bool IsHighlighted(views::View* entry_view) {
+    return MediaNotificationAudioDeviceSelectorView::
+        get_entry_is_highlighted_for_testing(entry_view);
+  }
+
   std::string GetButtonText(views::View* view) {
     return base::UTF16ToUTF8(static_cast<views::LabelButton*>(view)->GetText());
   }
@@ -112,25 +128,37 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest, DeviceButtonsCreated) {
 
   MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "1");
-
-  std::vector<std::string> button_texts;
-  ASSERT_TRUE(view_->device_button_container_ != nullptr);
-
-  std::transform(
-      view_->device_button_container_->children().cbegin(),
-      view_->device_button_container_->children().cend(),
-      std::back_inserter(button_texts), [](views::View* child) {
-        return base::UTF16ToASCII(
-            static_cast<const views::LabelButton*>(child)->GetText());
-      });
-  EXPECT_THAT(button_texts, testing::UnorderedElementsAre(
-                                "Speaker", "Headphones", "Earbuds"));
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
+
+  ASSERT_TRUE(view_->audio_device_entries_container_ != nullptr);
+
+  auto container_children = view_->audio_device_entries_container_->children();
+  ASSERT_EQ(container_children.size(), 3u);
+
+  EXPECT_EQ(EntryLabelText(container_children.at(0)), "Speaker");
+  EXPECT_EQ(EntryLabelText(container_children.at(1)), "Headphones");
+  EXPECT_EQ(EntryLabelText(container_children.at(2)), "Earbuds");
+}
+
+TEST_F(MediaNotificationAudioDeviceSelectorViewTest,
+       ExpandButtonOpensEntryContainer) {
+  provider_->AddDevice("Speaker", "1");
+  service_->set_device_provider_for_testing(std::move(provider_));
+  MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
+  view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
+
+  ASSERT_TRUE(view_->expand_button_);
+  EXPECT_FALSE(view_->audio_device_entries_container_->GetVisible());
+  SimulateButtonClick(view_->expand_button_);
+  EXPECT_TRUE(view_->audio_device_entries_container_->GetVisible());
 }
 
 TEST_F(MediaNotificationAudioDeviceSelectorViewTest,
        DeviceButtonClickNotifiesContainer) {
-  // When buttons are clicked the media notification container should be
+  // When buttons are clicked the media notification delegate should be
   // informed.
   provider_->AddDevice("Speaker", "1");
   provider_->AddDevice("Headphones", "2");
@@ -143,13 +171,12 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest,
   EXPECT_CALL(delegate, OnAudioSinkChosen("3")).Times(1);
 
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "1");
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
 
-  for (views::View* child : view_->device_button_container_->children()) {
-    view_->ButtonPressed(
-        static_cast<views::Button*>(child),
-        ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
-                       ui::EventTimeForNow(), 0, 0));
+  for (views::View* child :
+       view_->audio_device_entries_container_->children()) {
+    SimulateButtonClick(child);
   }
 }
 
@@ -163,12 +190,13 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest, CurrentDeviceHighlighted) {
 
   MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "3");
+      &delegate, service_.get(), "3", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
 
-  auto* first_button = static_cast<views::MdTextButton*>(
-      view_->device_button_container_->children().front());
-  EXPECT_EQ(first_button->GetText(), base::UTF8ToUTF16("Earbuds"));
-  EXPECT_TRUE(first_button->GetProminent());
+  auto* first_entry =
+      view_->audio_device_entries_container_->children().front();
+  EXPECT_EQ(EntryLabelText(first_entry), "Earbuds");
+  EXPECT_TRUE(IsHighlighted(first_entry));
 }
 
 TEST_F(MediaNotificationAudioDeviceSelectorViewTest,
@@ -181,31 +209,26 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest,
 
   MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "1");
-
-  auto button_is_highlighted = [](views::View* view) {
-    return static_cast<views::MdTextButton*>(view)->GetProminent();
-  };
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
 
-  auto& buttons = view_->device_button_container_->children();
+  auto& container_children = view_->audio_device_entries_container_->children();
 
   // There should be only one highlighted button. It should be the first button.
   // It's text should be "Speaker"
-  EXPECT_EQ(
-      std::count_if(buttons.begin(), buttons.end(), button_is_highlighted), 1);
-  EXPECT_EQ(std::find_if(buttons.begin(), buttons.end(), button_is_highlighted),
-            buttons.begin());
-  EXPECT_EQ(GetButtonText(buttons.front()), "Speaker");
+  EXPECT_EQ(util::ranges::count_if(container_children, IsHighlighted), 1);
+  EXPECT_EQ(util::ranges::find_if(container_children, IsHighlighted),
+            container_children.begin());
+  EXPECT_EQ(EntryLabelText(container_children.front()), "Speaker");
 
   // Simulate a device change
   view_->UpdateCurrentAudioDevice("3");
 
   // The button for "Earbuds" should come before all others & be highlighted.
-  EXPECT_EQ(
-      std::count_if(buttons.begin(), buttons.end(), button_is_highlighted), 1);
-  EXPECT_EQ(std::find_if(buttons.begin(), buttons.end(), button_is_highlighted),
-            buttons.begin());
-  EXPECT_EQ(GetButtonText(buttons.front()), "Earbuds");
+  EXPECT_EQ(util::ranges::count_if(container_children, IsHighlighted), 1);
+  EXPECT_EQ(util::ranges::find_if(container_children, IsHighlighted),
+            container_children.begin());
+  EXPECT_EQ(EntryLabelText(container_children.front()), "Earbuds");
 }
 
 TEST_F(MediaNotificationAudioDeviceSelectorViewTest, DeviceButtonsChange) {
@@ -219,10 +242,8 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest, DeviceButtonsChange) {
 
   MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "1");
-
-  std::vector<std::string> button_texts;
-  ASSERT_TRUE(view_->device_button_container_ != nullptr);
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
 
   provider->ResetDevices();
   // Make "Monitor" the default device.
@@ -230,15 +251,14 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest, DeviceButtonsChange) {
                       media::AudioDeviceDescription::kDefaultDeviceId);
   provider->RunUICallback();
 
-  EXPECT_EQ(view_->device_button_container_->children().size(), 1u);
-  ASSERT_FALSE(view_->device_button_container_->children().empty());
-  auto* button = static_cast<const views::MdTextButton*>(
-      view_->device_button_container_->children().at(0));
-  EXPECT_EQ(base::UTF16ToUTF8(button->GetText()), "Monitor");
+  auto& container_children = view_->audio_device_entries_container_->children();
+  EXPECT_EQ(container_children.size(), 1u);
+  ASSERT_FALSE(container_children.empty());
+  EXPECT_EQ(EntryLabelText(container_children.front()), "Monitor");
 
   // When the device highlighted in the UI is removed, the UI should fall back
   // to highlighting the default device.
-  EXPECT_TRUE(button->GetProminent());
+  EXPECT_TRUE(IsHighlighted(container_children.front()));
 }
 
 TEST_F(MediaNotificationAudioDeviceSelectorViewTest, VisibilityChanges) {
@@ -253,7 +273,8 @@ TEST_F(MediaNotificationAudioDeviceSelectorViewTest, VisibilityChanges) {
   MockMediaNotificationAudioDeviceSelectorViewDelegate delegate;
   EXPECT_CALL(delegate, OnAudioDeviceSelectorViewSizeChanged).Times(1);
   view_ = std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-      &delegate, service_.get(), gfx::Size(), "1");
+      &delegate, service_.get(), "1", gfx::kPlaceholderColor,
+      gfx::kPlaceholderColor);
   EXPECT_FALSE(view_->GetVisible());
 
   testing::Mock::VerifyAndClearExpectations(&delegate);

chrome/browser/ui/views/global_media_controls/media_notification_container_impl_view.cc

@@ -50,9 +50,6 @@ constexpr int kMinVisibleActionsForExpanding = 4;
 // press as a click.
 constexpr int kMinMovementSquaredToBeDragging = 10;
 
-// The height of the |MediaNotificationAudioDeviceSelectorView|.
-constexpr int kAudioDeviceSelectorViewHeight = 40;
-
 }  // anonymous namespace
 
 class MediaNotificationContainerImplView::DismissButton
@@ -128,8 +125,8 @@ MediaNotificationContainerImplView::MediaNotificationContainerImplView(
       !is_cast_notification) {
     auto audio_device_selector_view =
         std::make_unique<MediaNotificationAudioDeviceSelectorView>(
-            this, service_, gfx::Size(kWidth, kAudioDeviceSelectorViewHeight),
-            audio_sink_id_);
+            this, service_, audio_sink_id_, foreground_color_,
+            background_color_);
     audio_device_selector_view_ =
         AddChildView(std::move(audio_device_selector_view));
     view_->UpdateCornerRadius(message_center::kNotificationCornerRadius, 0);
@@ -334,6 +331,8 @@ void MediaNotificationContainerImplView::OnColorsChanged(SkColor foreground,
     background_color_ = background;
     UpdateDismissButtonBackground();
   }
+  if (audio_device_selector_view_)
+    audio_device_selector_view_->OnColorsChanged(foreground, background);
 }
 
 void MediaNotificationContainerImplView::OnHeaderClicked() {
@@ -484,6 +483,8 @@ void MediaNotificationContainerImplView::OnSizeChanged() {
     DCHECK(audio_device_selector_view_size.width() == kWidth);
     new_size.set_height(new_size.height() +
                         audio_device_selector_view_size.height());
+    view_->UpdateAudioDeviceSelectorAvailability(
+        audio_device_selector_view_->GetVisible());
   }
 
   if (overlay_)

components/media_message_center/media_notification_background.cc

@@ -302,6 +302,25 @@ void MediaNotificationBackground::Paint(gfx::Canvas* canvas,
 
     canvas->DrawRect(draw_bounds, flags);
   }
+
+  if (audio_device_selector_availability_) {
+    // Draw a gradient to fade the color background of the audio device picker
+    // and the image together.
+    gfx::Rect draw_bounds = GetBottomGradientBounds(*view);
+
+    const SkColor colors[2] = {
+        background_color, SkColorSetA(background_color, SK_AlphaTRANSPARENT)};
+    const SkPoint points[2] = {gfx::PointToSkPoint(draw_bounds.bottom_center()),
+                               gfx::PointToSkPoint(draw_bounds.top_center())};
+
+    cc::PaintFlags flags;
+    flags.setAntiAlias(true);
+    flags.setStyle(cc::PaintFlags::kFill_Style);
+    flags.setShader(cc::PaintShader::MakeLinearGradient(points, colors, nullptr,
+                                                        2, SkTileMode::kClamp));
+
+    canvas->DrawRect(draw_bounds, flags);
+  }
 }
 
 void MediaNotificationBackground::UpdateArtwork(const gfx::ImageSkia& image) {
@@ -344,6 +363,14 @@ void MediaNotificationBackground::UpdateFavicon(const gfx::ImageSkia& icon) {
   UpdateColorsInternal();
 }
 
+void MediaNotificationBackground::UpdateAudioDeviceSelectorAvailability(
+    bool availability) {
+  if (audio_device_selector_availability_ == availability)
+    return;
+
+  audio_device_selector_availability_ = availability;
+}
+
 SkColor MediaNotificationBackground::GetBackgroundColor(
     const views::View& owner) const {
   if (background_color_.has_value())
@@ -421,6 +448,20 @@ gfx::Rect MediaNotificationBackground::GetGradientBounds(
       view_bounds.y(), kMediaImageGradientWidth, view_bounds.height()));
 }
 
+gfx::Rect MediaNotificationBackground::GetBottomGradientBounds(
+    const views::View& owner) const {
+  if (artwork_.isNull())
+    return gfx::Rect(0, 0, 0, 0);
+
+  const gfx::Rect& view_bounds = owner.GetContentsBounds();
+  return owner.GetMirroredRect(gfx::Rect(
+      gfx::Point(
+          view_bounds.width() - GetArtworkVisibleWidth(view_bounds.size()),
+          view_bounds.bottom() - kMediaImageGradientWidth),
+      gfx::Size(GetArtworkVisibleWidth(view_bounds.size()),
+                kMediaImageGradientWidth)));
+}
+
 SkPoint MediaNotificationBackground::GetGradientStartPoint(
     const gfx::Rect& draw_bounds) const {
   return gfx::PointToSkPoint(base::i18n::IsRTL() ? draw_bounds.right_center()

components/media_message_center/media_notification_background.h

@@ -41,6 +41,7 @@ class COMPONENT_EXPORT(MEDIA_MESSAGE_CENTER) MediaNotificationBackground
   bool UpdateCornerRadius(int top_radius, int bottom_radius);
   bool UpdateArtworkMaxWidthPct(double max_width_pct);
   void UpdateFavicon(const gfx::ImageSkia& icon);
+  void UpdateAudioDeviceSelectorAvailability(bool availability);
 
   SkColor GetBackgroundColor(const views::View& owner) const;
   SkColor GetForegroundColor(const views::View& owner) const;
@@ -59,6 +60,7 @@ class COMPONENT_EXPORT(MEDIA_MESSAGE_CENTER) MediaNotificationBackground
   gfx::Rect GetArtworkBounds(const views::View& owner) const;
   gfx::Rect GetFilledBackgroundBounds(const views::View& owner) const;
   gfx::Rect GetGradientBounds(const views::View& owner) const;
+  gfx::Rect GetBottomGradientBounds(const views::View& owner) const;
   SkPoint GetGradientStartPoint(const gfx::Rect& draw_bounds) const;
   SkPoint GetGradientEndPoint(const gfx::Rect& draw_bounds) const;
   SkColor GetDefaultBackgroundColor(const views::View& owner) const;
@@ -70,6 +72,7 @@ class COMPONENT_EXPORT(MEDIA_MESSAGE_CENTER) MediaNotificationBackground
   gfx::ImageSkia favicon_;
   gfx::ImageSkia artwork_;
   double artwork_max_width_pct_;
+  bool audio_device_selector_availability_ = false;
 
   base::Optional<SkColor> background_color_;
   base::Optional<SkColor> foreground_color_;

components/media_message_center/media_notification_view_impl.cc

@@ -474,6 +474,12 @@ void MediaNotificationViewImpl::OnThemeChanged() {
   UpdateForegroundColor();
 }
 
+void MediaNotificationViewImpl::UpdateAudioDeviceSelectorAvailability(
+    bool availability) {
+  GetMediaNotificationBackground()->UpdateAudioDeviceSelectorAvailability(
+      availability);
+}
+
 views::Button* MediaNotificationViewImpl::GetHeaderRowForTesting() const {
   return header_row_;
 }

components/media_message_center/media_notification_view_impl.h

@@ -83,6 +83,8 @@ class COMPONENT_EXPORT(MEDIA_MESSAGE_CENTER) MediaNotificationViewImpl
   void UpdateWithVectorIcon(const gfx::VectorIcon& vector_icon) override;
   void OnThemeChanged() override;
 
+  void UpdateAudioDeviceSelectorAvailability(bool availability);
+
   const views::Label* title_label_for_testing() const { return title_label_; }
 
   const views::Label* artist_label_for_testing() const { return artist_label_; }