mash: Move directly linked NewWindowDelegate to mojom::NewWindowClient.

ash/common/wm_shell.h

Index: ash/common/wm_shell.h
diff --git a/ash/common/wm_shell.h b/ash/common/wm_shell.h
index 9cf207bed1e45514e483ce44b40a927ae16f0eff..a4369bc6441ba4d681d802bf665f2229ee0a1d2c 100644
--- a/ash/common/wm_shell.h
+++ b/ash/common/wm_shell.h
@@ -40,7 +40,6 @@ enum class PointerWatcherEventTypes;
 }
 
 namespace ash {
-
 class AcceleratorController;
 class AccessibilityDelegate;
 class BrightnessControlDelegate;
@@ -53,7 +52,6 @@ class KeyboardUI;
 class LocaleNotificationController;
 class MaximizeModeController;
 class MruWindowTracker;
-class NewWindowDelegate;
 class PaletteDelegate;
 class ScopedDisableInternalMouseAndKeyboard;
 class SessionStateDelegate;
@@ -82,6 +80,10 @@ class WorkspaceEventHandler;
 enum class LoginStatus;
 enum class TaskSwitchSource;
 
+namespace mojom {
+class NewWindowClient;
+}
+
 namespace wm {
 class MaximizeModeEventHandler;
 class WindowState;
@@ -137,8 +139,8 @@ class ASH_EXPORT WmShell {
 
   MediaDelegate* media_delegate() { return media_delegate_.get(); }
 
-  NewWindowDelegate* new_window_delegate() {
-    return new_window_delegate_.get();
+  mojom::NewWindowClient* new_window_client() {
+    return new_window_client_.get();
   }
 
   // NOTE: Prefer ScopedRootWindowForNewWindows when setting temporarily.
@@ -460,6 +462,10 @@ class ASH_EXPORT WmShell {
   friend class Shell;
   friend class WmShellTestApi;
 
+  // Used in testing to replace the delegate with a local mock.
+  void SetNewWindowClient(
+      std::unique_ptr<mojom::NewWindowClient> new_window_client);
+
   static WmShell* instance_;
 
   base::ObserverList<ShellObserver> shell_observers_;
@@ -477,7 +483,7 @@ class ASH_EXPORT WmShell {
   std::unique_ptr<MaximizeModeController> maximize_mode_controller_;
   std::unique_ptr<MediaDelegate> media_delegate_;
   std::unique_ptr<MruWindowTracker> mru_window_tracker_;
-  std::unique_ptr<NewWindowDelegate> new_window_delegate_;
+  std::unique_ptr<mojom::NewWindowClient> new_window_client_;
   std::unique_ptr<PaletteDelegate> palette_delegate_;
   std::unique_ptr<ShelfController> shelf_controller_;
   std::unique_ptr<ShelfDelegate> shelf_delegate_;