Enable keyboard navigation for Desktopcapture window selection dialog

chrome/browser/ui/views/desktop_media_picker_views.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_DESKTOP_MEDIA_PICKER_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_DESKTOP_MEDIA_PICKER_VIEWS_H_
 
 #include "chrome/browser/media/desktop_media_list_observer.h"
 #include "chrome/browser/media/desktop_media_picker.h"
 #include "ui/views/window/dialog_delegate.h"
@@ skipping 115 matching lines @@
   void OnDoubleClick();
 
   // views::View overrides.
   gfx::Size GetPreferredSize() const override;
   void Layout() override;
 
   // views::DialogDelegateView overrides.
   ui::ModalType GetModalType() const override;
   base::string16 GetWindowTitle() const override;
   bool IsDialogButtonEnabled(ui::DialogButton button) const override;
+  views::View* GetInitiallyFocusedView() override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
   bool Accept() override;
   void DeleteDelegate() override;
 
   void OnMediaListRowsChanged();
 
   DesktopMediaSourceView* GetMediaSourceViewForTesting(int index) const;
 
  private:
   DesktopMediaPickerViews* parent_;
@@ skipping 32 matching lines @@
 
   // The |dialog_| is owned by the corresponding views::Widget instance.
   // When DesktopMediaPickerViews is destroyed the |dialog_| is destroyed
   // asynchronously by closing the widget.
   DesktopMediaPickerDialogView* dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopMediaPickerViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DESKTOP_MEDIA_PICKER_VIEWS_H_