Cleanup: Fix base header include guards.

base/android/java_runtime.h

Index: base/android/java_runtime.h
diff --git a/base/android/java_runtime.h b/base/android/java_runtime.h
index bde4c5c6bd07811fb8be7adb79ff990daf2d7f45..4ca889e05f1df28a59cbaaeadd2a5a039c9ba782 100644
--- a/base/android/java_runtime.h
+++ b/base/android/java_runtime.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 BASE_ANDROID_JAVA_RUNTIME_H
-#define BASE_ANDROID_JAVA_RUNTIME_H
+#ifndef BASE_ANDROID_JAVA_RUNTIME_H_
+#define BASE_ANDROID_JAVA_RUNTIME_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/base_export.h"
@@ -25,4 +25,4 @@ class BASE_EXPORT JavaRuntime {
 }  // namespace android
 }  // namespace base
 
-#endif  // BASE_ANDROID_JAVA_RUNTIME_H
+#endif  // BASE_ANDROID_JAVA_RUNTIME_H_