Make it possible to load ChromeVox on the oobe and login screens.

chrome/browser/chromeos/login/webui_login_view.cc

 // Copyright (c) 2011 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/webui_login_view.h"
 
 #include "chrome/browser/chromeos/accessibility_util.h"
 #include "chrome/browser/chromeos/login/proxy_settings_dialog.h"
 #include "chrome/browser/chromeos/login/webui_login_display.h"
 #include "chrome/browser/chromeos/status/clock_menu_button.h"
@@ skipping 50 matching lines @@
   webui_login_->tab_contents()->set_delegate(this);
 }
 
 std::string WebUILoginView::GetClassName() const {
   return kViewClassName;
 }
 
 bool WebUILoginView::AcceleratorPressed(
     const views::Accelerator& accelerator) {
   if (accelerator == accel_toggle_accessibility_) {
-    accessibility::ToggleAccessibility();
+    accessibility::ToggleAccessibility(GetWebUI());
   } else {
     return false;
   }
   return true;
 }
 
 gfx::NativeWindow WebUILoginView::GetNativeWindow() const {
   return GetWidget()->GetNativeWindow();
 }
 
@@ skipping 123 matching lines @@
 bool WebUILoginView::HandleContextMenu(const ContextMenuParams& params) {
   // Do not show the context menu.
 #ifndef NDEBUG
   return false;
 #else
   return true;
 #endif
 }
 
 }  // namespace chromeos