Scrub the vestigal breakpad crash dump attempts metrics code.

components/browser_watcher/crash_reporting_metrics_win.h

-// Copyright 2015 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_BROWSER_WATCHER_CRASH_REPORTING_METRICS_WIN_H_
-#define COMPONENTS_BROWSER_WATCHER_CRASH_REPORTING_METRICS_WIN_H_
-
-#include "base/strings/string16.h"
-
-namespace browser_watcher {
-
-// Stores and retrieves metrics related to crash dump attempts.
-class CrashReportingMetrics {
- public:
-  // Represents the currently stored metrics.
-  struct Values {
-    // A count of crash dump attempts.
-    int crash_dump_attempts;
-    // A count of successful crash dump attempts.
-    int successful_crash_dumps;
-    // A count of failed crash dump attempts.
-    int failed_crash_dumps;
-    // A count of dump without crash attempts.
-    int dump_without_crash_attempts;
-    // A count of successful dump without crash attempts.
-    int successful_dumps_without_crash;
-    // A count of failed dump without crash attempts.
-    int failed_dumps_without_crash;
-  };
-
-  // Instantiates an instance that will store and retrieve its metrics from
-  // |registry_path|.
-  explicit CrashReportingMetrics(const base::string16& registry_path);
-
-  // Records that a crash dump is being attempted.
-  void RecordCrashDumpAttempt();
-
-  // Records that a dump without crash is being attempted.
-  void RecordDumpWithoutCrashAttempt();
-
-  // Records the result of a crash dump attempt.
-  void RecordCrashDumpAttemptResult(bool succeeded);
-
-  // Records the result of a dump without crash attempt.
-  void RecordDumpWithoutCrashAttemptResult(bool succeeded);
-
-  // Returns the currently stored metrics and resets them to 0.
-  Values RetrieveAndResetMetrics();
-
- private:
-  base::string16 registry_path_;
-};
-
-}  // namespace browser_watcher
-
-#endif  // COMPONENTS_BROWSER_WATCHER_CRASH_REPORTING_METRICS_WIN_H_