CrOS Tablet Window management - Split Screen part I

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/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
@@ skipping 68 matching lines @@
 }
 
 void MaximizeModeWindowManager::OnOverviewModeStarting() {
   SetDeferBoundsUpdates(true);
 }
 
 void MaximizeModeWindowManager::OnOverviewModeEnded() {
   SetDeferBoundsUpdates(false);
 }
 
+void MaximizeModeWindowManager::OnSplitViewModeEnded() {
+  // Maximize All windows upon exit split view mode.
+  for (auto& pair : window_state_map_) {
+    wm::WMEvent event(wm::WM_EVENT_MAXIMIZE);
+    wm::GetWindowState(pair.first)->OnWMEvent(&event);
+  }
+}
+
 void MaximizeModeWindowManager::OnWindowDestroying(aura::Window* window) {
   if (IsContainerWindow(window)) {
     // container window can be removed on display destruction.
     window->RemoveObserver(this);
     observed_container_windows_.erase(window);
   } else if (base::ContainsValue(added_windows_, window)) {
     // Added window was destroyed before being shown.
     added_windows_.erase(window);
     window->RemoveObserver(this);
   } else {
@@ skipping 200 matching lines @@
   // Inform the WorkspaceLayoutManager that we want to show a backdrop behind
   // the topmost window of its container.
   for (auto* controller : Shell::GetAllRootWindowControllers()) {
     controller->workspace_controller()->SetBackdropDelegate(
         enable ? base::MakeUnique<MaximizeModeBackdropDelegateImpl>()
                : nullptr);
   }
 }
 
 }  // namespace ash