mash: Reverse the responsibilities of the NewWindowClient.

ash/common/test/wm_shell_test_api.h

Index: ash/common/test/wm_shell_test_api.h
diff --git a/ash/common/test/wm_shell_test_api.h b/ash/common/test/wm_shell_test_api.h
index 1e46ba94a3b48e58ac3296088afe60295fad96dd..07ab6fff2e916e0978fb233de0b52d38f41418fb 100644
--- a/ash/common/test/wm_shell_test_api.h
+++ b/ash/common/test/wm_shell_test_api.h
@@ -13,10 +13,6 @@ namespace ash {
 
 class SystemTrayDelegate;
 
-namespace mojom {
-class NewWindowClient;
-}
-
 // Test API to access the internal state of the singleton WmShell.
 class WmShellTestApi {
  public:
@@ -25,8 +21,6 @@ class WmShellTestApi {
 
   void SetSystemTrayDelegate(std::unique_ptr<SystemTrayDelegate> delegate);
 
-  void SetNewWindowClient(std::unique_ptr<mojom::NewWindowClient> client);
-
  private:
   DISALLOW_COPY_AND_ASSIGN(WmShellTestApi);
 };