Minimal support for OOBE/login for chrome-athena

chrome/browser/chromeos/login/ui/webui_login_view.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/ui/webui_login_view.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 145 matching lines @@
 
   for (AccelMap::iterator i(accel_map_.begin()); i != accel_map_.end(); ++i)
     AddAccelerator(i->first);
 }
 
 WebUILoginView::~WebUILoginView() {
   FOR_EACH_OBSERVER(web_modal::ModalDialogHostObserver,
                     observer_list_,
                     OnHostDestroying());
 
-  if (ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
+  if (ash::Shell::HasInstance() &&
+      ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
     ash::Shell::GetInstance()->GetPrimarySystemTray()->
         SetNextFocusableView(NULL);
   }
 }
 
 void WebUILoginView::Init() {
   Profile* signin_profile = ProfileHelper::GetSigninProfile();
   auth_extension_.reset(new ScopedGaiaAuthExtension(signin_profile));
   webui_login_ = new views::WebView(signin_profile);
   webui_login_->set_allow_accelerators(true);
@@ skipping 119 matching lines @@
                               *network, NULL, GetNativeWindow());
   dialog->Show();
 }
 
 void WebUILoginView::OnPostponedShow() {
   set_is_hidden(false);
   OnLoginPromptVisible();
 }
 
 void WebUILoginView::SetStatusAreaVisible(bool visible) {
-  if (ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
+  if (ash::Shell::HasInstance() &&
+      ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
     ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
     if (visible) {
       // Tray may have been initialized being hidden.
       tray->SetVisible(visible);
       tray->GetWidget()->Show();
     } else {
       tray->GetWidget()->Hide();
     }
   }
 }
 
 void WebUILoginView::SetUIEnabled(bool enabled) {
   forward_keyboard_event_ = enabled;
-  ash::Shell::GetInstance()->GetPrimarySystemTray()->SetEnabled(enabled);
+  if (ash::Shell::HasInstance())
+    ash::Shell::GetInstance()->GetPrimarySystemTray()->SetEnabled(enabled);
 }
 
 void WebUILoginView::AddFrameObserver(FrameObserver* frame_observer) {
   DCHECK(frame_observer);
   DCHECK(!frame_observer_list_.HasObserver(frame_observer));
   frame_observer_list_.AddObserver(frame_observer);
 }
 
 void WebUILoginView::RemoveFrameObserver(FrameObserver* frame_observer) {
   DCHECK(frame_observer);
@@ skipping 78 matching lines @@
 bool WebUILoginView::IsPopupOrPanel(const WebContents* source) const {
   return true;
 }
 
 bool WebUILoginView::TakeFocus(content::WebContents* source, bool reverse) {
   // In case of blocked UI (ex.: sign in is in progress)
   // we should not process focus change events.
   if (!forward_keyboard_event_)
     return false;
 
-  ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
-  if (tray && tray->GetWidget()->IsVisible()) {
-    tray->SetNextFocusableView(this);
-    ash::Shell::GetInstance()->RotateFocus(reverse ? ash::Shell::BACKWARD :
-                                                     ash::Shell::FORWARD);
+  if (ash::Shell::HasInstance()) {
+    ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
+    if (tray && tray->GetWidget()->IsVisible()) {
+      tray->SetNextFocusableView(this);
+      ash::Shell::GetInstance()->RotateFocus(reverse ? ash::Shell::BACKWARD :
+                                                      ash::Shell::FORWARD);
+    }
   }
 
   return true;
 }
 
 void WebUILoginView::RequestMediaAccessPermission(
     WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback) {
   if (MediaStreamInfoBarDelegate::Create(web_contents, request, callback))
@@ skipping 41 matching lines @@
   webui_visible_ = true;
 }
 
 void WebUILoginView::ReturnFocus(bool reverse) {
   // Return the focus to the web contents.
   webui_login_->web_contents()->FocusThroughTabTraversal(reverse);
   GetWidget()->Activate();
 }
 
 }  // namespace chromeos