Fix comment for posix LaunchApp wrt PATH searching.

base/process_util.h

 // Copyright (c) 2009 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.
 
 // This file/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 
@@ skipping 117 matching lines @@
                bool wait, bool start_hidden, ProcessHandle* process_handle);
 #elif defined(OS_POSIX)
 // Runs the application specified in argv[0] with the command line argv.
 // Before launching all FDs open in the parent process will be marked as
 // close-on-exec.  |fds_to_remap| defines a mapping of src fd->dest fd to
 // propagate FDs into the child process.
 //
 // As above, if wait is true, execute synchronously. The pid will be stored
 // in process_handle if that pointer is non-null.
 //
-// Note that the first argument in argv must point to the filename,
-// and must be fully specified.
+// Note that the first argument in argv must point to the executable filename.
+// If the filename is not fully specified, PATH will be searched.
 typedef std::vector<std::pair<int, int> > file_handle_mapping_vector;
 bool LaunchApp(const std::vector<std::string>& argv,
                const file_handle_mapping_vector& fds_to_remap,
                bool wait, ProcessHandle* process_handle);
 #endif
 
 // Executes the application specified by cl. This function delegates to one
 // of the above two platform-specific functions.
 bool LaunchApp(const CommandLine& cl,
                bool wait, bool start_hidden, ProcessHandle* process_handle);
@@ skipping 242 matching lines @@
 // overflow. Has no effect if the OS doesn't provide the necessary facility.
 void EnableTerminationOnHeapCorruption();
 
 // If supported on the platform, and the user has sufficent rights, increase
 // the current process's scheduling priority to a high priority.
 void RaiseProcessToHighPriority();
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_UTIL_H_