WebView: fix header file guards

android_webview/browser/aw_metrics_service_client.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 ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_IMPL_H_
-#define ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_IMPL_H_
+#ifndef ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_
+#define ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_
 
 #include "components/metrics/enabled_state_provider.h"
 #include "components/metrics/metrics_service_client.h"
 
 class PrefService;
 
 namespace base {
 class FilePath;
 }
 
@@ skipping 14 matching lines @@
  protected:
   AwMetricsServiceClient();
   ~AwMetricsServiceClient() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AwMetricsServiceClient);
 };
 
 }  // namespace android_webview
 
-#endif  // ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_IMPL_H_
+#endif  // ANDROID_WEBVIEW_BROWSER_AW_METRICS_SERVICE_CLIENT_H_