Fix uber tray to accept focus via tab selection

ash/system/tray/system_tray.cc

 // Copyright (c) 2012 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/tray/system_tray.h"
 
 #include "ash/shell.h"
 #include "ash/shell/panel_window.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/tray/tray_constants.h"
@@ skipping 13 matching lines @@
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/events.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/skia_util.h"
+#include "ui/views/accessible_pane_view.h"
 #include "ui/views/border.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
@@ skipping 409 matching lines @@
       clock_observer_(NULL),
       ime_observer_(NULL),
       network_observer_(NULL),
       power_status_observer_(NULL),
       update_observer_(NULL),
       user_observer_(NULL),
       bubble_(NULL),
       popup_(NULL),
       background_(new internal::SystemTrayBackground),
       should_show_launcher_(false),
+      taking_focus_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(hide_background_animator_(this,
           0, kTrayBackgroundAlpha)),
       ALLOW_THIS_IN_INITIALIZER_LIST(hover_background_animator_(this,
           0, kTrayBackgroundHoverAlpha - kTrayBackgroundAlpha)) {
   container_ = new views::View;
   container_->SetLayoutManager(new views::BoxLayout(
       views::BoxLayout::kHorizontal, 0, 0, 0));
   container_->set_background(background_);
   container_->set_border(
       views::Border::CreateEmptyBorder(1, 1, 1, 1));
@@ skipping 89 matching lines @@
   SetVisible(true);
   PreferredSizeChanged();
 }
 
 void SystemTray::SetPaintsBackground(
       bool value,
       internal::BackgroundAnimator::ChangeType change_type) {
   hide_background_animator_.SetPaintsBackground(value, change_type);
 }
 
+void SystemTray::TakeFocus(View* next_focusable_view) {
+  taking_focus_ = true;
+  views::AccessiblePaneView* view =
+      static_cast<views::AccessiblePaneView*>(GetWidget()->GetContentsView());
+  view->SetPaneFocusAndFocusDefault();
+  GetWidget()->Activate();
+
+  SetNextFocusableView(next_focusable_view);
+  taking_focus_ = false;
+}
+
 void SystemTray::ShowItems(std::vector<SystemTrayItem*>& items,
                            bool detailed,
                            bool activate) {
   CHECK(!popup_);
   CHECK(!bubble_);
   bubble_ = new internal::SystemTrayBubble(this, container_, items, detailed);
   bubble_->set_can_activate(activate);
   popup_ = views::BubbleDelegateView::CreateBubble(bubble_);
   // If we have focus the shelf should be visible and we need to continue
   // showing the shelf when the popup is shown.
@@ skipping 99 matching lines @@
       popup_->Hide();
     }
   }
   return base::EVENT_CONTINUE;
 }
 
 void SystemTray::DidProcessEvent(const base::NativeEvent& event) {
 }
 
 }  // namespace ash