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

content/public/browser/child_process_data.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 CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_DATA_H_
 #define CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_DATA_H_
 
 #include "base/process.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
@@ skipping 11 matching lines @@
   string16 name;
 
   // The unique identifier for this child process. This identifier is NOT a
   // process ID, and will be unique for all types of child process for
   // one run of the browser.
   int id;
 
   // The handle to the process.
   base::ProcessHandle handle;
 
-  ChildProcessData(content::ProcessType type)
+  explicit ChildProcessData(content::ProcessType type)
       : type(type), id(0), handle(base::kNullProcessHandle) {
-  }
+}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_DATA_H_