Move temp file functions to base namespace.

base/memory/shared_memory_posix.cc

Index: base/memory/shared_memory_posix.cc
diff --git a/base/memory/shared_memory_posix.cc b/base/memory/shared_memory_posix.cc
index 8bc7da8537e1a19b59f0475fc4fa3640ca109208..46202471c61a8588e83b6328b53a514857db7da4 100644
--- a/base/memory/shared_memory_posix.cc
+++ b/base/memory/shared_memory_posix.cc
@@ -141,8 +141,7 @@ bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
     DCHECK(!options.open_existing);
     // Q: Why not use the shm_open() etc. APIs?
     // A: Because they're limited to 4mb on OS X.  FFFFFFFUUUUUUUUUUU
-    fp.reset(
-        file_util::CreateAndOpenTemporaryShmemFile(&path, options.executable));
+    fp.reset(base::CreateAndOpenTemporaryShmemFile(&path, options.executable));
 
     if (fp) {
       // Also open as readonly so that we can ShareReadOnlyToProcess.