Have OobeUI handle display observation

chrome/browser/ui/webui/chromeos/login/oobe_ui.cc

 // Copyright (c) 2012 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/webui/chromeos/login/oobe_ui.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 60 matching lines @@
 #include "chrome/grit/chrome_unscaled_resources.h"
 #include "chrome/grit/component_extension_resources.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "content/public/common/content_switches.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/web_ui_util.h"
+#include "ui/display/display.h"
+#include "ui/display/screen.h"
 
 namespace chromeos {
 
 namespace {
 
 const char* kKnownDisplayTypes[] = {OobeUI::kOobeDisplay,
                                     OobeUI::kLoginDisplay,
                                     OobeUI::kLockDisplay,
                                     OobeUI::kUserAddingDisplay,
                                     OobeUI::kAppLaunchSplashDisplay,
@@ skipping 233 matching lines @@
   network_element::AddLocalizedStrings(html_source);
 
   // Set up the chrome://userimage/ source.
   options::UserImageSource* user_image_source =
       new options::UserImageSource();
   content::URLDataSource::Add(profile, user_image_source);
 
   // TabHelper is required for OOBE webui to make webview working on it.
   content::WebContents* contents = web_ui->GetWebContents();
   extensions::TabHelper::CreateForWebContents(contents);
+
+  display::Screen::GetScreen()->AddObserver(this);
 }
 
 OobeUI::~OobeUI() {
   network_dropdown_handler_->RemoveObserver(GetView<ErrorScreenHandler>());
+  display::Screen::GetScreen()->RemoveObserver(this);
   if (ash_util::IsRunningInMash()) {
     // TODO: Ash needs to expose screen dimming api. See
     // http://crbug.com/646034.
     NOTIMPLEMENTED();
   }
 }
 
 CoreOobeView* OobeUI::GetCoreOobeView() {
   return core_handler_;
 }
@@ skipping 80 matching lines @@
 }
 
 GaiaView* OobeUI::GetGaiaScreenView() {
   return GetView<GaiaScreenHandler>();
 }
 
 UserBoardView* OobeUI::GetUserBoardView() {
   return GetView<UserBoardScreenHandler>();
 }
 
+void OobeUI::OnDisplayAdded(const display::Display& new_display) {}
+
+void OobeUI::OnDisplayRemoved(const display::Display& old_display) {}
+
+void OobeUI::OnDisplayMetricsChanged(const display::Display& display,
+                                     uint32_t changed_metrics) {
+  display::Display primary_display =
+      display::Screen::GetScreen()->GetPrimaryDisplay();
+  if (display.id() != primary_display.id() ||
+      !(changed_metrics & DISPLAY_METRIC_BOUNDS)) {
+    return;
+  }
+
+  const gfx::Size& size = primary_display.size();
+  GetCoreOobeView()->SetClientAreaSize(size.width(), size.height());
+}
+
 void OobeUI::OnShutdownPolicyChanged(bool reboot_on_shutdown) {
   core_handler_->UpdateShutdownAndRebootVisibility(reboot_on_shutdown);
 }
 
 AppLaunchSplashScreenView* OobeUI::GetAppLaunchSplashScreenView() {
   return GetView<AppLaunchSplashScreenHandler>();
 }
 
 ArcKioskSplashScreenView* OobeUI::GetArcKioskSplashScreenView() {
   return GetView<ArcKioskSplashScreenHandler>();
@@ skipping 148 matching lines @@
       g_browser_process->local_state()->GetBoolean(prefs::kOobeMdMode)) {
     return;
   }
 
   base::DictionaryValue localized_strings;
   GetLocalizedStrings(&localized_strings);
   static_cast<CoreOobeView*>(core_handler_)->ReloadContent(localized_strings);
 }
 
 }  // namespace chromeos