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

chrome/browser/extensions/extension_protocols.cc

Index: chrome/browser/extensions/extension_protocols.cc
diff --git a/chrome/browser/extensions/extension_protocols.cc b/chrome/browser/extensions/extension_protocols.cc
index ae0a0fbbdd2f7c64932d6d78a699b79e3c39de48..3baf2c0289e9f1b64e3d747f92f89a63cb15d898 100644
--- a/chrome/browser/extensions/extension_protocols.cc
+++ b/chrome/browser/extensions/extension_protocols.cc
@@ -230,7 +230,7 @@ class GeneratedBackgroundPageJob : public net::URLRequestSimpleJob {
 
 base::Time GetFileLastModifiedTime(const base::FilePath& filename) {
   if (base::PathExists(filename)) {
-    base::PlatformFileInfo info;
+    base::File::Info info;
     if (base::GetFileInfo(filename, &info))
       return info.last_modified;
   }
@@ -239,7 +239,7 @@ base::Time GetFileLastModifiedTime(const base::FilePath& filename) {
 
 base::Time GetFileCreationTime(const base::FilePath& filename) {
   if (base::PathExists(filename)) {
-    base::PlatformFileInfo info;
+    base::File::Info info;
     if (base::GetFileInfo(filename, &info))
       return info.creation_time;
   }