Remove deprecated Ozone initialization functions.

ui/ozone/platform/drm/ozone_platform_gbm.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 "ui/ozone/platform/drm/ozone_platform_gbm.h"
 
 #include <dlfcn.h>
 #include <fcntl.h>
 #include <gbm.h>
 #include <stdlib.h>
@@ skipping 121 matching lines @@
     std::unique_ptr<DrmWindowHost> platform_window(new DrmWindowHost(
         delegate, bounds, adapter, event_factory_ozone_.get(), cursor_.get(),
         window_manager_.get(), display_manager_.get(), overlay_manager_.get()));
     platform_window->Initialize();
     return std::move(platform_window);
   }
   std::unique_ptr<display::NativeDisplayDelegate> CreateNativeDisplayDelegate()
       override {
     return base::MakeUnique<DrmNativeDisplayDelegate>(display_manager_.get());
   }
-  void InitializeUI() override {
-    InitParams default_params;
-    InitializeUI(default_params);
-  }
   void InitializeUI(const InitParams& args) override {
     // Ozone drm can operate in three modes configured at runtime:
     //   1. legacy mode where browser and gpu components communicate
     //      via param traits IPC.
     //   2. single-process mode where browser and gpu components
     //      communicate via PostTask.
     //   3. mojo mode where browser and gpu components communicate
     //      via mojo IPC.
     // Currently, mojo mode uses mojo in a single process but this is
     // an interim implementation detail that will be eliminated in a
@@ skipping 44 matching lines @@
                                   event_factory_ozone_->input_controller()));
     cursor_factory_ozone_.reset(new BitmapCursorFactoryOzone);
     overlay_manager_.reset(
         new DrmOverlayManager(adapter, window_manager_.get()));
 
     if (using_mojo_ || single_process_) {
       mus_thread_proxy_->ProvideManagers(display_manager_.get(),
                                          overlay_manager_.get());
     }
   }
-  void InitializeGPU() override {
-    InitParams default_params;
-    InitializeGPU(default_params);
-  }
   void InitializeGPU(const InitParams& args) override {
     // TODO(rjkroege): services/ui should initialize this with a connector.
     // However, in-progress refactorings in services/ui make it difficult to
     // require this at present. Set using_mojo_ like below once this is
     // complete.
     // using_mojo_ = args.connector != nullptr;
 
     InterThreadMessagingProxy* itmp;
     if (using_mojo_ || single_process_) {
       itmp = mus_thread_proxy_.get();
@@ skipping 51 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformGbm);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformGbm() {
   return new OzonePlatformGbm;
 }
 
 }  // namespace ui