Cleanup: Add a note to BrowserChildProcessHost::Launch().

content/public/browser/browser_child_process_host.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_BROWSER_CHILD_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_
 
 #include "base/process_util.h"
 #include "base/string16.h"
 #include "build/build_config.h"
@@ skipping 15 matching lines @@
 class CONTENT_EXPORT BrowserChildProcessHost : public IPC::Sender {
  public:
   // Used to create a child process host. The delegate must outlive this object.
   static BrowserChildProcessHost* Create(
       ProcessType type,
       BrowserChildProcessHostDelegate* delegate);
 
   virtual ~BrowserChildProcessHost() {}
 
   // Derived classes call this to launch the child process asynchronously.
+  // Takes ownership of |cmd_line|.
   virtual void Launch(
 #if defined(OS_WIN)
       const FilePath& exposed_dir,
 #elif defined(OS_POSIX)
       bool use_zygote,
       const base::EnvironmentVector& environ,
 #endif
       CommandLine* cmd_line) = 0;
 
   virtual const ChildProcessData& GetData() const = 0;
@@ skipping 19 matching lines @@
 
 #if defined(OS_MACOSX)
   // Returns a PortProvider used to get process metrics for child processes.
   static base::ProcessMetrics::PortProvider* GetPortProvider();
 #endif
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_