app_list: Enable level 1 of cpplint, be stricker.

ui/app_list/views/contents_animator.h

 // 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.
 
 #ifndef UI_APP_LIST_VIEWS_CONTENTS_ANIMATOR_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_ANIMATOR_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 62 matching lines @@
 class DefaultAnimator : public ContentsAnimator {
  public:
   explicit DefaultAnimator(ContentsView* contents_view);
 
   ~DefaultAnimator() override {}
 
   // ContentsAnimator overrides:
   std::string NameForTests() const override;
   void Update(double progress, int from_page, int to_page) override;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(DefaultAnimator);
 };
 
 // Animator between the start page and apps grid page.
 class StartToAppsAnimator : public ContentsAnimator {
  public:
   explicit StartToAppsAnimator(ContentsView* contents_view);
 
   ~StartToAppsAnimator() override {}
 
   // ContentsAnimator overrides:
   std::string NameForTests() const override;
   void Update(double progress, int start_page, int apps_page) override;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(StartToAppsAnimator);
 };
 
 // Animator from start page to custom page.
 class StartToCustomAnimator : public ContentsAnimator {
  public:
   explicit StartToCustomAnimator(ContentsView* contents_view);
 
   std::string NameForTests() const override;
   void Update(double progress, int start_page, int custom_page) override;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(StartToCustomAnimator);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_ANIMATOR_H_