Move temp file functions to base namespace.

chrome/test/perf/memory_test.cc

Index: chrome/test/perf/memory_test.cc
diff --git a/chrome/test/perf/memory_test.cc b/chrome/test/perf/memory_test.cc
index 95a03c04991b5a1863d6cdf8d88494a011ae4417..f5952ba73ac9f894a7c9cad7e0e75823bcca570b 100644
--- a/chrome/test/perf/memory_test.cc
+++ b/chrome/test/perf/memory_test.cc
@@ -233,7 +233,7 @@ class MemoryTest : public UIPerfTest {
     // We create a copy of the test dir and use it so that each
     // run of this test starts with the same data.  Running this
     // test has the side effect that it will change the profile.
-    if (!file_util::CreateNewTempDirectory(kTempDirName, &temp_dir_)) {
+    if (!base::CreateNewTempDirectory(kTempDirName, &temp_dir_)) {
       LOG(ERROR) << "Could not create temp directory:" << kTempDirName;
       return false;
     }