It is time.

ui/views/examples/example_base.cc

-// Copyright (c) 2012 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/views/examples/example_base.h"
-
-#include <stdarg.h>
-
-#include "base/strings/stringprintf.h"
-#include "ui/views/view.h"
-
-namespace views {
-namespace examples {
-
-// Logs the specified string to the status area of the examples window.
-// This function can only be called if there is a visible examples window.
-void LogStatus(const std::string& status);
-
-namespace {
-
-// TODO(oshima): Check if this special container is still necessary.
-class ContainerView : public View {
- public:
-  explicit ContainerView(ExampleBase* base)
-      : example_view_created_(false),
-        example_base_(base) {
-  }
-
- private:
-  // View:
-  virtual void ViewHierarchyChanged(
-      const ViewHierarchyChangedDetails& details) override {
-    View::ViewHierarchyChanged(details);
-    // We're not using child == this because a Widget may not be
-    // available when this is added to the hierarchy.
-    if (details.is_add && GetWidget() && !example_view_created_) {
-      example_view_created_ = true;
-      example_base_->CreateExampleView(this);
-    }
-  }
-
-  // True if the example view has already been created, or false otherwise.
-  bool example_view_created_;
-
-  ExampleBase* example_base_;
-
-  DISALLOW_COPY_AND_ASSIGN(ContainerView);
-};
-
-}  // namespace
-
-ExampleBase::~ExampleBase() {}
-
-ExampleBase::ExampleBase(const char* title) : example_title_(title) {
-  container_ = new ContainerView(this);
-}
-
-// Prints a message in the status area, at the bottom of the window.
-void ExampleBase::PrintStatus(const char* format, ...) {
-  va_list ap;
-  va_start(ap, format);
-  std::string msg;
-  base::StringAppendV(&msg, format, ap);
-  LogStatus(msg);
-}
-
-}  // namespace examples
-}  // namespace views