Move file_util::Delete to the base namespace

net/base/file_stream_unittest.cc

Index: net/base/file_stream_unittest.cc
diff --git a/net/base/file_stream_unittest.cc b/net/base/file_stream_unittest.cc
index 89b6dbd401ba801eaffb7e39c22dc81850e3fe0a..02f0072906ed407239c12d668376eccdc25dae3d 100644
--- a/net/base/file_stream_unittest.cc
+++ b/net/base/file_stream_unittest.cc
@@ -44,7 +44,7 @@ class FileStreamTest : public PlatformTest {
     file_util::WriteFile(temp_file_path_, kTestData, kTestDataSize);
   }
   virtual void TearDown() {
-    EXPECT_TRUE(file_util::Delete(temp_file_path_, false));
+    EXPECT_TRUE(base::Delete(temp_file_path_, false));
 
     PlatformTest::TearDown();
   }
@@ -116,7 +116,7 @@ TEST_F(FileStreamTest, UseFileHandle) {
   read_stream.reset();
 
   // 2. Test writing with a file handle.
-  file_util::Delete(temp_file_path(), false);
+  base::Delete(temp_file_path(), false);
   flags = base::PLATFORM_FILE_OPEN_ALWAYS | base::PLATFORM_FILE_WRITE;
   file = base::CreatePlatformFile(temp_file_path(), flags, &created, NULL);