Cleanup: Fix some lint errors in content/.

content/common/zygote_commands_linux.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_COMMON_ZYGOTE_COMMANDS_LINUX_H_
 #define CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_
 
 namespace content {
 
 // Contents of the initial message sent from the zygote to the browser when it
@@ skipping 17 matching lines @@
 
 // These are the command codes used on the wire between the browser and the
 // zygote.
 enum {
   // Fork off a new renderer.
   kZygoteCommandFork = 0,
 
   // Reap a renderer child.
   kZygoteCommandReap = 1,
 
-  // Check what happend to a child process.
+  // Check what happened to a child process.
   kZygoteCommandGetTerminationStatus = 2,
 
   // Read a bitmask of kSandboxLinux*
   kZygoteCommandGetSandboxStatus = 3
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_