virtual/override specifier cleanup in ui/ (mostly Ozone code).

ui/ozone/platform/egltest/ozone_platform_egltest.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/egltest/ozone_platform_egltest.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
@@ skipping 182 matching lines @@
 //
 // This just manages the native window lifetime using
 // ShimGetNativeWindow & ShimReleaseNativeWindow.
 class SurfaceOzoneEgltest : public SurfaceOzoneEGL {
  public:
   SurfaceOzoneEgltest(ShimNativeWindowId window_id,
                       LibeglplatformShimLoader* eglplatform_shim)
       : eglplatform_shim_(eglplatform_shim) {
     native_window_ = eglplatform_shim_->ShimGetNativeWindow(window_id);
   }
-  ~SurfaceOzoneEgltest() {
+  ~SurfaceOzoneEgltest() override {
     bool ret = eglplatform_shim_->ShimReleaseNativeWindow(native_window_);
     DCHECK(ret);
   }
 
   intptr_t GetNativeWindow() override { return native_window_; }
 
   bool OnSwapBuffers() override { return true; }
 
   bool ResizeNativeWindow(const gfx::Size& viewport_size) override {
     return true;
@@ skipping 71 matching lines @@
 
 // Test platform for EGL.
 //
 // This is a tiny EGL-based platform. Creation of the native window is
 // handled by a separate library called eglplatform_shim.so.1 because
 // this itself is platform specific and we want to test out multiple
 // hardware platforms.
 class OzonePlatformEgltest : public OzonePlatform {
  public:
   OzonePlatformEgltest() : shim_initialized_(false) {}
-  virtual ~OzonePlatformEgltest() {
+  ~OzonePlatformEgltest() override {
     if (shim_initialized_)
       eglplatform_shim_.ShimTerminate();
   }
 
   void LoadShim() {
     std::string library = GetShimLibraryName();
 
     if (eglplatform_shim_.Load(library))
       return;
 
@@ skipping 79 matching lines @@
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformEgltest() {
   OzonePlatformEgltest* platform = new OzonePlatformEgltest;
   platform->Initialize();
   return platform;
 }
 
 }  // namespace ui