kiosk: Fix zoom crash regression.

chrome/browser/ui/views/apps/chrome_native_app_window_views.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/ui/views/apps/chrome_native_app_window_views.h"
 
 #include "apps/ui/views/app_window_frame_view.h"
 #include "base/command_line.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/chrome_page_zoom.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/views/apps/shaped_app_window_targeter.h"
 #include "chrome/browser/ui/views/extensions/extension_keybinding_registry_views.h"
 #include "chrome/browser/ui/views/frame/taskbar_decorator.h"
+#include "chrome/browser/ui/zoom/zoom_controller.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "chrome/common/chrome_switches.h"
 #include "extensions/common/extension.h"
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/webview/webview.h"
 #include "ui/views/widget/widget.h"
@@ skipping 238 matching lines @@
   // Ensures that kiosk mode accelerators are enabled when in kiosk mode (to be
   // future proof). This is needed because GetAcceleratorTable() uses a static
   // to store data and only checks kiosk mode once. If a platform app is
   // launched before kiosk mode starts, the kiosk accelerators will not be
   // registered. This DCHECK catches the case.
   DCHECK(!is_kiosk_app_mode ||
          accelerator_table.size() ==
              arraysize(kAppWindowAcceleratorMap) +
                  arraysize(kAppWindowKioskAppModeAcceleratorMap));
 
+  // Ensure there is a ZoomController in kiosk mode, otherwise the processing
+  // of the accelerators will cause a crash.
+  DCHECK(!is_kiosk_app_mode ||
+         ZoomController::FromWebContents(web_view()->GetWebContents()));
+
   for (std::map<ui::Accelerator, int>::const_iterator iter =
            accelerator_table.begin();
        iter != accelerator_table.end(); ++iter) {
     if (is_kiosk_app_mode && !chrome::IsCommandAllowedInAppMode(iter->second))
       continue;
 
     focus_manager->RegisterAccelerator(
         iter->first, ui::AcceleratorManager::kNormalPriority, this);
   }
 }
@@ skipping 384 matching lines @@
     InitializePanelWindow(create_params);
   } else {
     InitializeDefaultWindow(create_params);
   }
   extension_keybinding_registry_.reset(new ExtensionKeybindingRegistryViews(
       Profile::FromBrowserContext(app_window->browser_context()),
       widget()->GetFocusManager(),
       extensions::ExtensionKeybindingRegistry::PLATFORM_APPS_ONLY,
       NULL));
 }