Don't pass ProcessHandle through ChildProcessHostDelegate.

base/process/process.h

 // Copyright (c) 2011 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 BASE_PROCESS_PROCESS_PROCESS_H_
 #define BASE_PROCESS_PROCESS_PROCESS_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/move.h"
@@ skipping 30 matching lines @@
 
   // The destructor does not terminate the process.
   ~Process() {}
 
   // Move operator= for C++03 move emulation of this type.
   Process& operator=(RValue other);
 
   // Returns an object for the current process.
   static Process Current();
 
+  // Creates an object from a |handle| owned by someone else.
+  // Don't use this for new code. It is only intended to ease the migration to
+  // a strict ownership model.
+  // TODO(rvargas) crbug.com/417532: Remove this code.
+  static Process DeprecatedGetProcessFromHandle(ProcessHandle handle);
+
   // Returns true if processes can be backgrounded.
   static bool CanBackgroundProcesses();
 
   // Returns true if this objects represents a valid process.
   bool IsValid() const;
 
   // Returns a handle for this process. There is no guarantee about when that
   // handle becomes invalid because this object retains ownership.
   ProcessHandle Handle() const;
 
@@ skipping 33 matching lines @@
   bool is_current_process_;
   win::ScopedHandle process_;
 #else
   ProcessHandle process_;
 #endif
 };
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_PROCESS_PROCESS_H_