Enable keyboard navigation for Desktopcapture window selection dialog

chrome/browser/ui/views/desktop_media_picker_views.cc

 // Copyright 2013 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 "chrome/browser/ui/views/desktop_media_picker_views.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/media/desktop_media_list.h"
@@ skipping 403 matching lines @@
       parent_web_contents &&
       !parent_web_contents->GetDelegate()->IsNeverVisible(parent_web_contents);
   if (modal_dialog) {
     widget = constrained_window::ShowWebModalDialogViews(this,
                                                          parent_web_contents);
   } else {
     widget = DialogDelegate::CreateDialogWidget(this, context, NULL);
     widget->Show();
   }
 
+  // Enable and request keyboard focus

[Sergey Ulanov, 2015/09/14 20:59:24]

Please add . at the end of the sentence.

[gyzhou, 2015/09/14 22:51:29]

Done.

+  SetFocusable(true);
+  RequestFocus();
+
   // If the picker is not modal to the calling web contents then it is displayed
   // in its own top-level window, so in that case it needs to be filtered out of
   // the list of top-level windows available for capture, and to achieve that
   // the Id is passed to DesktopMediaList.
   DesktopMediaID::Id dialog_window_id = 0;
   if (!modal_dialog) {
 #if defined(USE_ASH)
     if (chrome::IsNativeWindowInAsh(widget->GetNativeWindow())) {
       dialog_window_id =
           DesktopMediaID::RegisterAuraWindow(
@@ skipping 151 matching lines @@
   content::BrowserThread::PostTask(
       content::BrowserThread::UI, FROM_HERE,
       base::Bind(callback_, source));
   callback_.Reset();
 }
 
 // static
 scoped_ptr<DesktopMediaPicker> DesktopMediaPicker::Create() {
   return scoped_ptr<DesktopMediaPicker>(new DesktopMediaPickerViews());
 }