Convert base::file_util to use File instead of PlatformFile.

net/base/upload_file_element_reader_unittest.cc

Index: net/base/upload_file_element_reader_unittest.cc
diff --git a/net/base/upload_file_element_reader_unittest.cc b/net/base/upload_file_element_reader_unittest.cc
index f3ccb4180f9e7e4fe9fc81fc786e63d7217ab675..52f0f2788ffefd5a0867892e32f7a9ae06ffe635 100644
--- a/net/base/upload_file_element_reader_unittest.cc
+++ b/net/base/upload_file_element_reader_unittest.cc
@@ -204,7 +204,7 @@ TEST_F(UploadFileElementReaderTest, Range) {
 }
 
 TEST_F(UploadFileElementReaderTest, FileChanged) {
-  base::PlatformFileInfo info;
+  base::File::Info info;
   ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));
 
   // Expect one second before the actual modification time to simulate change.
@@ -349,7 +349,7 @@ TEST_F(UploadFileElementReaderSyncTest, Range) {
 }
 
 TEST_F(UploadFileElementReaderSyncTest, FileChanged) {
-  base::PlatformFileInfo info;
+  base::File::Info info;
   ASSERT_TRUE(base::GetFileInfo(temp_file_path_, &info));
 
   // Expect one second before the actual modification time to simulate change.