Mus: Delete unused Mandoline Surfaces code

components/mus/ws/window_server.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 "components/mus/ws/window_server.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 468 matching lines @@
   const Display* display = display_manager_->GetDisplayContaining(window);
   return display ? display->root_window() : nullptr;
 }
 
 void WindowServer::ScheduleSurfaceDestruction(ServerWindow* window) {
   Display* display = display_manager_->GetDisplayContaining(window);
   if (display)
     display->ScheduleSurfaceDestruction(window);
 }
 
-ServerWindow* WindowServer::FindWindowForSurface(
-    const ServerWindow* ancestor,
-    mojom::SurfaceType surface_type,
-    const ClientWindowId& client_window_id) {
-  WindowTree* window_tree;
-  if (ancestor->id().client_id == kInvalidClientId) {
-    WindowManagerAndDisplay wm_and_display =
-        display_manager_->GetWindowManagerAndDisplay(ancestor);
-    window_tree = wm_and_display.window_manager_state
-                      ? wm_and_display.window_manager_state->tree()
-                      : nullptr;
-  } else {
-    window_tree = GetTreeWithId(ancestor->id().client_id);
-  }
-  if (!window_tree)
-    return nullptr;
-  if (surface_type == mojom::SurfaceType::DEFAULT) {
-    // At embed points the default surface comes from the embedded app.
-    WindowTree* tree_with_root = GetTreeWithRoot(ancestor);
-    if (tree_with_root)
-      window_tree = tree_with_root;
-  }
-  return window_tree->GetWindowByClientId(client_window_id);
-}
-
 void WindowServer::OnWindowDestroyed(ServerWindow* window) {
   ProcessWindowDeleted(window);
 }
 
 void WindowServer::OnWillChangeWindowHierarchy(ServerWindow* window,
                                                ServerWindow* new_parent,
                                                ServerWindow* old_parent) {
   if (in_destructor_)
     return;
 
@@ skipping 156 matching lines @@
 void WindowServer::OnFirstDisplayReady() {
   delegate_->OnFirstDisplayReady();
 }
 
 void WindowServer::OnNoMoreDisplays() {
   delegate_->OnNoMoreDisplays();
 }
 
 }  // namespace ws
 }  // namespace mus