ChromeOS: disable ToggleMaximize for login and lock screen.

ash/wm/maximize_mode/maximize_mode_window_manager.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 "ash/wm/maximize_mode/maximize_mode_window_manager.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
+#include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/common/window_state.h"
 #include "ash/wm/common/wm_event.h"
 #include "ash/wm/maximize_mode/maximize_mode_window_state.h"
 #include "ash/wm/maximize_mode/workspace_backdrop_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
@@ skipping 138 matching lines @@
     const display::Display& display) {
   DisplayConfigurationChanged();
 }
 
 void MaximizeModeWindowManager::OnDisplayMetricsChanged(const display::Display&,
                                                         uint32_t) {
   // Nothing to do here.
 }
 
 void MaximizeModeWindowManager::OnTouchEvent(ui::TouchEvent* event) {
+  const SessionStateDelegate* delegate =
+      Shell::GetInstance()->session_state_delegate();
+
+  if (delegate->IsScreenLocked())
+    return;
+
+  switch (delegate->GetSessionState()) {
+    case SessionStateDelegate::SESSION_STATE_LOGIN_PRIMARY:
+      return;
+    case SessionStateDelegate::SESSION_STATE_ACTIVE:
+      break;
+    case SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY:
+      return;
+  }
+
   if (event->type() != ui::ET_TOUCH_PRESSED)
     return;
 
   // Find the active window (from the primary screen) to un-fullscreen.
   aura::Window* window = wm::GetActiveWindow();
   if (!window)
     return;
 
   wm::WindowState* window_state = wm::GetWindowState(window);
   if (!window_state->IsFullscreen() || window_state->in_immersive_fullscreen())
@@ skipping 150 matching lines @@
     RootWindowController* controller = *iter;
     aura::Window* container = Shell::GetContainer(
         controller->GetRootWindow(), kShellWindowId_DefaultContainer);
     controller->workspace_controller()->SetMaximizeBackdropDelegate(
         std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate>(
             enable ? new WorkspaceBackdropDelegate(container) : NULL));
   }
 }
 
 }  // namespace ash