[Cleanup] Remove the no longer used GoogleSearch.AccessPoint metric.

chrome/browser/google/google_search_counter_android.h

-// Copyright (c) 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 CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_ANDROID_H_
-#define CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_ANDROID_H_
-
-#include "base/macros.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class Profile;
-
-// A listener for counting Google searches in Android Chrome from various search
-// access points. No actual search query content is observed. See
-// GoogleSearchMetrics for more details about these access points.
-class GoogleSearchCounterAndroid : content::NotificationObserver {
- public:
-  explicit GoogleSearchCounterAndroid(Profile* profile);
-  ~GoogleSearchCounterAndroid() override;
-
- private:
-  friend class GoogleSearchCounterAndroidTest;
-
-  void ProcessCommittedEntry(const content::NotificationSource& source,
-                             const content::NotificationDetails& details);
-
-  // content::NotificationObserver:
-  void Observe(int type,
-               const content::NotificationSource& source,
-               const content::NotificationDetails& details) override;
-
-  Profile* profile_;
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(GoogleSearchCounterAndroid);
-};
-
-#endif  // CHROME_BROWSER_GOOGLE_GOOGLE_SEARCH_COUNTER_ANDROID_H_