[Metrics] Move Windows-specific CountBrowserCrashDumpAttempts() out of MetricsService

chrome/browser/metrics/chrome_metrics_service_client.h

Index: chrome/browser/metrics/chrome_metrics_service_client.h
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.h b/chrome/browser/metrics/chrome_metrics_service_client.h
index 7ed043e774092893e12f6e1e56ac6fb2c8eaecbf..3d1c26b3b9b077ffd3fe18346947b2d3680b2064 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.h
+++ b/chrome/browser/metrics/chrome_metrics_service_client.h
@@ -64,6 +64,12 @@ class ChromeMetricsServiceClient : public metrics::MetricsServiceClient,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+#if defined(OS_WIN)
+  // Counts (and removes) the browser crash dump attempt signals left behind by
+  // any previous browser processes which generated a crash dump.
+  void CountBrowserCrashDumpAttempts();
+#endif  // OS_WIN
+
   base::ThreadChecker thread_checker_;
 
   // The MetricsService that |this| is a client of. Weak pointer.