Fix include guards of files in src/ios.

ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h

Index: ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h
diff --git a/ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h b/ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h
index 23c3969c44012c8a66fbe1d95b47bbfc954ed3ed..6f426cc2310a959d43f3c39252a8bd455827eea5 100644
--- a/ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h
+++ b/ios/chrome/browser/metrics/ios_chrome_stability_metrics_provider.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
-#define IOS_CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
+#ifndef IOS_CHROME_BROWSER_METRICS_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_
+#define IOS_CHROME_BROWSER_METRICS_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_
 
 #include "base/macros.h"
 #include "base/metrics/user_metrics.h"
@@ -43,4 +43,4 @@ class IOSChromeStabilityMetricsProvider : public metrics::MetricsProvider,
   DISALLOW_COPY_AND_ASSIGN(IOSChromeStabilityMetricsProvider);
 };
 
-#endif  // IOS_CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
+#endif  // IOS_CHROME_BROWSER_METRICS_IOS_CHROME_STABILITY_METRICS_PROVIDER_H_