Revert 270173 "Remove SCM_CREDENTIALS fallback code from breakpad"

trunk/src/base/linux_util.h

Index: trunk/src/base/linux_util.h
===================================================================
--- trunk/src/base/linux_util.h	(revision 270276)
+++ trunk/src/base/linux_util.h	(working copy)
@@ -24,6 +24,13 @@
 // Set the Linux Distro string.
 BASE_EXPORT void SetLinuxDistro(const std::string& distro);
 
+// Return the inode number for the UNIX domain socket |fd|.
+BASE_EXPORT bool FileDescriptorGetInode(ino_t* inode_out, int fd);
+
+// Find the process which holds the given socket, named by inode number. If
+// multiple processes hold the socket, this function returns false.
+BASE_EXPORT bool FindProcessHoldingSocket(pid_t* pid_out, ino_t socket_inode);
+
 // For a given process |pid|, look through all its threads and find the first
 // thread with /proc/[pid]/task/[thread_id]/syscall whose first N bytes matches
 // |expected_data|, where N is the length of |expected_data|.