Delete mus surfaces hit testing

components/mus/ws/window_finder_unittest.cc

 // Copyright 2015 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 "components/mus/ws/window_finder.h"
 
 #include "components/mus/ws/server_window.h"
 #include "components/mus/ws/server_window_surface_manager.h"
 #include "components/mus/ws/server_window_surface_manager_test_api.h"
 #include "components/mus/ws/test_server_window_delegate.h"
@@ skipping 16 matching lines @@
   child1.SetVisible(true);
   child1.SetBounds(gfx::Rect(10, 10, 20, 20));
 
   ServerWindow child2(&window_delegate, WindowId(1, 4));
   root.Add(&child2);
   EnableHitTest(&child2);
   child2.SetVisible(true);
   child2.SetBounds(gfx::Rect(15, 15, 20, 20));
 
   gfx::Point local_point(16, 16);
-  EXPECT_EQ(&child2, FindDeepestVisibleWindowForEvents(&root, cc::SurfaceId(),
-                                                       &local_point));
+  EXPECT_EQ(&child2, FindDeepestVisibleWindowForEvents(&root, &local_point));
   EXPECT_EQ(gfx::Point(1, 1), local_point);
 
   local_point.SetPoint(13, 14);
-  EXPECT_EQ(&child1, FindDeepestVisibleWindowForEvents(&root, cc::SurfaceId(),
-                                                       &local_point));
+  EXPECT_EQ(&child1, FindDeepestVisibleWindowForEvents(&root, &local_point));
   EXPECT_EQ(gfx::Point(3, 4), local_point);
 
   child2.set_extended_hit_test_region(gfx::Insets(10, 10, 10, 10));
   local_point.SetPoint(13, 14);
-  EXPECT_EQ(&child2, FindDeepestVisibleWindowForEvents(&root, cc::SurfaceId(),
-                                                       &local_point));
+  EXPECT_EQ(&child2, FindDeepestVisibleWindowForEvents(&root, &local_point));
   EXPECT_EQ(gfx::Point(-2, -1), local_point);
 }
 
 }  // namespace ws
 }  // namespace mus