Move file_util::Delete to the base namespace

net/disk_cache/cache_util_unittest.cc

Index: net/disk_cache/cache_util_unittest.cc
diff --git a/net/disk_cache/cache_util_unittest.cc b/net/disk_cache/cache_util_unittest.cc
index 448520406d7e4912ee42d385799c8071dcc6a23d..74ae365db4cfce08e0ae4d752897760d4bc40aeb 100644
--- a/net/disk_cache/cache_util_unittest.cc
+++ b/net/disk_cache/cache_util_unittest.cc
@@ -65,7 +65,7 @@ TEST_F(CacheUtilTest, MoveCache) {
 TEST_F(CacheUtilTest, DeleteCache) {
   // DeleteCache won't delete subdirs, so let's not start with this
   // one around.
-  file_util::Delete(dir1_, false);
+  base::Delete(dir1_, false);
   disk_cache::DeleteCache(cache_dir_, false);
   EXPECT_TRUE(file_util::PathExists(cache_dir_)); // cache dir stays
   EXPECT_FALSE(file_util::PathExists(file1_));
@@ -75,7 +75,7 @@ TEST_F(CacheUtilTest, DeleteCache) {
 TEST_F(CacheUtilTest, DeleteCacheAndDir) {
   // DeleteCache won't delete subdirs, so let's not start with this
   // one around.
-  file_util::Delete(dir1_, false);
+  base::Delete(dir1_, false);
   disk_cache::DeleteCache(cache_dir_, true);
   EXPECT_FALSE(file_util::PathExists(cache_dir_)); // cache dir is gone
   EXPECT_FALSE(file_util::PathExists(file1_));