Listen OnDisplayMetricsChanged on lock screen

chrome/browser/chromeos/login/lock/webui_screen_locker.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/lock/webui_screen_locker.h"
 
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 50 matching lines @@
 WebUIScreenLocker::WebUIScreenLocker(ScreenLocker* screen_locker)
     : ScreenLockerDelegate(screen_locker),
       lock_ready_(false),
       webui_ready_(false),
       network_state_helper_(new login::NetworkStateHelper),
       is_observing_keyboard_(false),
       weak_factory_(this) {
   set_should_emit_login_prompt_visible(false);
   ash::Shell::GetInstance()->lock_state_controller()->AddObserver(this);
   ash::Shell::GetInstance()->delegate()->AddVirtualKeyboardStateObserver(this);
+  ash::Shell::GetScreen()->AddObserver(this);
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
 
   if (keyboard::KeyboardController::GetInstance()) {
     keyboard::KeyboardController::GetInstance()->AddObserver(this);
     is_observing_keyboard_ = true;
   }
 }
 
 void WebUIScreenLocker::LockScreen() {
   gfx::Rect bounds =
@@ skipping 67 matching lines @@
 
 void WebUIScreenLocker::FocusUserPod() {
   if (!webui_ready_)
     return;
   webui_login_->RequestFocus();
   GetWebUI()->CallJavascriptFunction("cr.ui.Oobe.forceLockedUserPodFocus");
 }
 
 WebUIScreenLocker::~WebUIScreenLocker() {
   DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
+  ash::Shell::GetScreen()->RemoveObserver(this);
   ash::Shell::GetInstance()->
       lock_state_controller()->RemoveObserver(this);
 
   ash::Shell::GetInstance()->delegate()->
       RemoveVirtualKeyboardStateObserver(this);
   // In case of shutdown, lock_window_ may be deleted before WebUIScreenLocker.
   if (lock_window_) {
     lock_window_->RemoveObserver(this);
     lock_window_->Close();
   }
@@ skipping 193 matching lines @@
     if (GetOobeUI()) {
       GetOobeUI()->GetCoreOobeActor()->ShowControlBar(false);
       if (login::LoginScrollIntoViewEnabled())
         GetOobeUI()->GetCoreOobeActor()->SetKeyboardState(true, new_bounds);
     }
   }
 
   keyboard_bounds_ = new_bounds;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// gfx::DisplayObserver implementation:
+
+void WebUIScreenLocker::OnDisplayAdded(const gfx::Display& new_display) {
+}
+
+void WebUIScreenLocker::OnDisplayRemoved(const gfx::Display& old_display) {
+}
+
+void WebUIScreenLocker::OnDisplayMetricsChanged(const gfx::Display& display,
+                                                uint32_t changed_metrics) {
+  gfx::Display primary_display =
+      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
+  if (display.id() != primary_display.id() ||
+      !(changed_metrics & DISPLAY_METRIC_BOUNDS)) {
+    return;
+  }
+
+  if (GetOobeUI()) {
+    const gfx::Size& size = primary_display.size();
+    GetOobeUI()->GetCoreOobeActor()->SetClientAreaSize(size.width(),
+                                                       size.height());
+  }
+}
+
 }  // namespace chromeos