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

components/arc/intent_helper/arc_intent_helper_bridge.cc

Index: components/arc/intent_helper/arc_intent_helper_bridge.cc
diff --git a/components/arc/intent_helper/arc_intent_helper_bridge.cc b/components/arc/intent_helper/arc_intent_helper_bridge.cc
index 019b00aa9392c8eb7c88c7b9a21598ad161db4f7..b691412c6e00863612c455b2230e235936bf3f83 100644
--- a/components/arc/intent_helper/arc_intent_helper_bridge.cc
+++ b/components/arc/intent_helper/arc_intent_helper_bridge.cc
@@ -7,10 +7,10 @@
 #include <utility>
 #include <vector>
 
-#include "ash/common/new_window_delegate.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/wallpaper/wallpaper_controller.h"
 #include "ash/common/wm_shell.h"
+#include "ash/public/interfaces/new_window.mojom.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/memory/weak_ptr.h"
@@ -70,7 +70,7 @@ void ArcIntentHelperBridge::OnOpenDownloads() {
   // downloads by default, which is what we want.  However if it is open it will
   // simply be brought to the forgeground without forcibly being navigated to
   // downloads, which is probably not ideal.
-  ash::WmShell::Get()->new_window_delegate()->OpenFileManager();
+  ash::WmShell::Get()->new_window_client()->OpenFileManager();
 }
 
 void ArcIntentHelperBridge::OnOpenUrl(const mojo::String& url) {