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

components/google/core/browser/google_search_metrics.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 COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_SEARCH_METRICS_H_
-#define COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_SEARCH_METRICS_H_
-
-#include "build/build_config.h"
-
-// A thin helper class used by parties interested in reporting Google search
-// metrics (mostly counts of searches from different access points). This class
-// partly exists to make testing easier.
-class GoogleSearchMetrics {
- public:
-  // Various Google Search access points, to be used with UMA enumeration
-  // histograms.
-  enum AccessPoint {
-    AP_OMNIBOX,
-    AP_OMNIBOX_INSTANT,
-    AP_DIRECT_NAV,
-    AP_DIRECT_NAV_INSTANT,
-    AP_HOME_PAGE,
-    AP_HOME_PAGE_INSTANT,
-    AP_SEARCH_APP,
-    AP_SEARCH_APP_INSTANT,
-    AP_OTHER,
-    AP_OTHER_INSTANT,
-    AP_BOUNDARY,
-  };
-
-  GoogleSearchMetrics();
-  virtual ~GoogleSearchMetrics();
-
-  // Record a single Google search from source |ap|.
-  virtual void RecordGoogleSearch(AccessPoint ap) const;
-
-#if defined(OS_ANDROID)
-  // Record a single Android Google search from source |ap|. |prerender_enabled|
-  // is set to true when prerendering is enabled via settings.
-  virtual void RecordAndroidGoogleSearch(AccessPoint ap,
-                                         bool prerender_enabled) const;
-#endif
-};
-
-#endif  // COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_SEARCH_METRICS_H_