Make it possible to launch chrome --mash with ozone_platform={wayland|x11}, chromeos=0

chrome/browser/ui/views/tabs/window_finder_ozone.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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 "chrome/browser/ui/views/tabs/window_finder.h"
 #include "chrome/browser/ui/views/tabs/window_finder_mus.h"
 
-#include "ui/aura/window.h"
-
-gfx::NativeWindow GetLocalProcessWindowAtPointAsh(
-    const gfx::Point& screen_point,
-    const std::set<gfx::NativeWindow>& ignore);
-
 gfx::NativeWindow WindowFinder::GetLocalProcessWindowAtPoint(
     const gfx::Point& screen_point,
     const std::set<gfx::NativeWindow>& ignore) {
   gfx::NativeWindow mus_result = nullptr;
   if (GetLocalProcessWindowAtPointMus(screen_point, ignore, &mus_result))
     return mus_result;
 
-  return GetLocalProcessWindowAtPointAsh(screen_point, ignore);
+  NOTREACHED() << "For Ozone builds, only --mash launch is supported for now.";
+  return nullptr;
 }