Add missing (and remove superfluous) 'explicit' from constructors.

chrome/browser/mac/security_wrappers.h

 // Copyright (c) 2012 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 CHROME_BROWSER_MAC_SECURITY_WRAPPERS_H_
 #define CHROME_BROWSER_MAC_SECURITY_WRAPPERS_H_
 
 #include <Security/Security.h>
 #include <Security/SecRequirement.h>
 
@@ skipping 76 matching lines @@
   SecKeychainAttributeList* attribute_list;
   UInt32 length;
   void* data;
 };
 
 // Holds a CrSKeychainItemAttributesAndData*, calling
 // CrSKeychainItemFreeAttributesAndData and freeing the owned
 // CrSKeychainItemAttributesAndData* on destruction.
 class ScopedCrSKeychainItemAttributesAndData {
  public:
-  ScopedCrSKeychainItemAttributesAndData(
+  explicit ScopedCrSKeychainItemAttributesAndData(
       CrSKeychainItemAttributesAndData* attributes_and_data);
   ~ScopedCrSKeychainItemAttributesAndData();
 
   CrSKeychainItemAttributesAndData* get() const {
     return attributes_and_data_.get();
   }
 
   CrSKeychainItemAttributesAndData* release() {
     return attributes_and_data_.release();
   }
@@ skipping 119 matching lines @@
 SecKeychainItemRef CrSKeychainItemCreateFromContent(
     const CrSKeychainItemAttributesAndData& attributes_and_data,
     SecKeychainRef keychain,
     SecAccessRef access);
 
 }  // namespace mac
 }  // namespace browser
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_MAC_SECURITY_WRAPPERS_H_