Fix include guards of files in src/ios.

ios/chrome/browser/browser_state/chrome_browser_state_impl.h

Index: ios/chrome/browser/browser_state/chrome_browser_state_impl.h
diff --git a/ios/chrome/browser/browser_state/chrome_browser_state_impl.h b/ios/chrome/browser/browser_state/chrome_browser_state_impl.h
index 54d5292c68d14f3f589a4b742ca01de26dca4f1f..b1a99a1f49cb944d7e12e0905cced3b36fb07991 100644
--- a/ios/chrome/browser/browser_state/chrome_browser_state_impl.h
+++ b/ios/chrome/browser/browser_state/chrome_browser_state_impl.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_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_
-#define IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_
+#ifndef IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_H_
+#define IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_H_
 
 #include <memory>
 
@@ -105,4 +105,4 @@ class ChromeBrowserStateImpl : public ios::ChromeBrowserState {
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserStateImpl);
 };
 
-#endif  // IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_
+#endif  // IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_IMPL_H_