Fix a header guard to match filepath.

content/child/webcrypto/algorithm_implementation.h

Index: content/child/webcrypto/algorithm_implementation.h
diff --git a/content/child/webcrypto/algorithm_implementation.h b/content/child/webcrypto/algorithm_implementation.h
index ac32413bcb83c4658eba7366fc61f2a6245b1690..725a8ea474326f7301cc29cb12a64caa3bddd997 100644
--- a/content/child/webcrypto/algorithm_implementation.h
+++ b/content/child/webcrypto/algorithm_implementation.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 CONTENT_CHILD_WEBCRYPTO_CRYPTO_ALGORITHM_IMPLEMENTATION_H_
-#define CONTENT_CHILD_WEBCRYPTO_CRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#ifndef CONTENT_CHILD_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#define CONTENT_CHILD_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
 
 #include <stdint.h>
 #include <vector>
@@ -171,4 +171,4 @@ class AlgorithmImplementation {
 
 }  // namespace content
 
-#endif  // CONTENT_CHILD_WEBCRYPTO_CRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#endif  // CONTENT_CHILD_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_