Prepare base/ for compilation with OS X 10.7 deployment target.

base/mac/authorization_util.mm

 // 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.
 
 #include "base/mac/authorization_util.h"
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 #include <sys/wait.h>
 
@@ skipping 90 matching lines @@
   // pipe may be NULL, but this function needs one.  In that case, use a local
   // pipe.
   FILE* local_pipe;
   FILE** pipe_pointer;
   if (pipe) {
     pipe_pointer = pipe;
   } else {
     pipe_pointer = &local_pipe;
   }
 
+// Deprecated in OS X 10.7. https://crbug.com/592663.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
   // AuthorizationExecuteWithPrivileges wants |char* const*| for |arguments|,
   // but it doesn't actually modify the arguments, and that type is kind of
   // silly and callers probably aren't dealing with that.  Put the cast here
   // to make things a little easier on callers.
   OSStatus status = AuthorizationExecuteWithPrivileges(authorization,
                                                        tool_path,
                                                        options,
                                                        (char* const*)arguments,
                                                        pipe_pointer);
+#pragma clang diagnostic pop
   if (status != errAuthorizationSuccess) {
     return status;
   }
 
   int line_pid = -1;
   size_t line_length = 0;
   char* line_c = fgetln(*pipe_pointer, &line_length);
   if (line_c) {
     if (line_length > 0 && line_c[line_length - 1] == '\n') {
       // line_c + line_length is the start of the next line if there is one.
@@ skipping 57 matching lines @@
     }
   } else {
     *exit_status_pointer = -1;
   }
 
   return status;
 }
 
 }  // namespace mac
 }  // namespace base