Improve process launch handle sharing API.

chrome/browser/shell_integration_linux.cc

Index: chrome/browser/shell_integration_linux.cc
diff --git a/chrome/browser/shell_integration_linux.cc b/chrome/browser/shell_integration_linux.cc
index a3cc1fa1a972e401ea94cd6511833674dcf52cd7..195ea49b39cbd9eaa5810723c950e9a2bcbde74d 100644
--- a/chrome/browser/shell_integration_linux.cc
+++ b/chrome/browser/shell_integration_linux.cc
@@ -72,11 +72,9 @@ bool LaunchXdgUtility(const std::vector<std::string>& argv, int* exit_code) {
   int devnull = open("/dev/null", O_RDONLY);
   if (devnull < 0)
     return false;
-  base::FileHandleMappingVector no_stdin;
-  no_stdin.push_back(std::make_pair(devnull, STDIN_FILENO));
 
   base::LaunchOptions options;
-  options.fds_to_remap = &no_stdin;
+  options.fds_to_remap.push_back(std::make_pair(devnull, STDIN_FILENO));
   base::Process process = base::LaunchProcess(argv, options);
   close(devnull);
   if (!process.IsValid())