Add real_path option to LaunchProcess

base/process/launch.h

Index: base/process/launch.h
diff --git a/base/process/launch.h b/base/process/launch.h
index 20b76fc35e4c1c32764ee04903a18cecd576cd8d..2b2040c7d420cc4c9e6b273c7e5907c03811c3a6 100644
--- a/base/process/launch.h
+++ b/base/process/launch.h
@@ -154,6 +154,11 @@ struct BASE_EXPORT LaunchOptions {
 #endif  // defined(OS_LINUX)
 
 #if defined(OS_POSIX)
+  // If not empty, launch the specified executable instead of
+  // cmdline.GetProgram(). This is useful when it is necessary to pass a custom
+  // argv[0].
+  base::FilePath real_path;
+
   // If non-null, a delegate to be run immediately prior to executing the new
   // program in the child process.
   //