Allow the cast tray to function as expected when the installed extension is missing API methods.

ash/system/cast/tray_cast.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/cast/tray_cast.h"
 
 #include "ash/cast_config_delegate.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shell.h"
@@ skipping 20 matching lines @@
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/layout/fill_layout.h"
 
 namespace ash {
 
 namespace {
 const int kStopButtonRightPadding = 18;
-
-// Callback helper for StopCast().
-void StopCastCallback(
-    CastConfigDelegate* cast_config,
-    const CastConfigDelegate::ReceiversAndActivites& receivers_activities) {
-  for (auto& item : receivers_activities) {
-    CastConfigDelegate::Activity activity = item.second.activity;
-    if (activity.allow_stop && activity.id.empty() == false)
-      cast_config->StopCasting(activity.id);
-  }
-}
-
-// Stops currently casting device.
-void StopCast() {
-  CastConfigDelegate* cast_config =
-      Shell::GetInstance()->system_tray_delegate()->GetCastConfigDelegate();
-  if (cast_config && cast_config->HasCastExtension()) {
-    cast_config->GetReceiversAndActivities(
-        base::Bind(&StopCastCallback, cast_config));
-  }
-}
-
 }  // namespace
 
 namespace tray {
 
 // This view is displayed in the system tray when the cast extension is active.
 // It asks the user if they want to cast the desktop. If they click on the
 // chevron, then a detail view will replace this view where the user will
 // actually pick the cast receiver.
 class CastSelectDefaultView : public TrayItemMore {
  public:
@@ skipping 102 matching lines @@
   // The view has two labels, one above the other. The top label (|title_|)
   // specifies that we are, say, "Casting desktop". The bottom label
   // (|details_|) specifies where we are casting to, ie, "SomeRandom cast"
   label_container_ = new views::View;
   label_container_->SetLayoutManager(
       new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
 
   title_ = new views::Label;
   title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   title_->SetFontList(bundle.GetFontList(ui::ResourceBundle::BoldFont));
+  title_->SetText(
+      bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_CAST_UNKNOWN_CAST_TYPE));
   label_container_->AddChildView(title_);
 
   details_ = new views::Label;
   details_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   details_->SetMultiLine(false);
   details_->SetEnabledColor(kHeaderTextColorNormal);
+  details_->SetText(
+      bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_CAST_UNKNOWN_RECEIVER));
   label_container_->AddChildView(details_);
 
   AddChildView(label_container_);
 
   // Add the stop bottom on the far-right. We customize how this stop button is
   // displayed inside of |Layout()|.
   base::string16 stop_button_text =
       ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
           IDS_ASH_STATUS_TRAY_CAST_STOP);
   stop_button_ = new TrayPopupLabelButton(this, stop_button_text);
@@ skipping 62 matching lines @@
       details_->SetText(receiver.name);
       Layout();
       break;
     }
   }
 }
 
 void CastCastView::ButtonPressed(views::Button* sender,
                                  const ui::Event& event) {
   DCHECK(sender == stop_button_);
-  StopCast();
+  cast_config_delegate_->StopCasting();
 }
 
 // This view by itself does very little. It acts as a front-end for managing
 // which of the two child views (|CastSelectDefaultView| and |CastCastView|)
 // is active.
 class CastDuplexView : public views::View {
  public:
   CastDuplexView(SystemTrayItem* owner,
                  CastConfigDelegate* config_delegate,
                  bool show_more);
@@ skipping 334 matching lines @@
   is_casting_ = started;
   UpdatePrimaryView();
 }
 
 void TrayCast::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
   if (tray_)
     tray_->UpdateAlignment(alignment);
 }
 
 }  // namespace ash