Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/profiles/profile_info_cache.cc

Index: chrome/browser/profiles/profile_info_cache.cc
diff --git a/chrome/browser/profiles/profile_info_cache.cc b/chrome/browser/profiles/profile_info_cache.cc
index 0ae399f5310c4395719e44bcea6adb0de3df6d3d..0c0fe7c801f2b178635a234c49b3d270d839efa1 100644
--- a/chrome/browser/profiles/profile_info_cache.cc
+++ b/chrome/browser/profiles/profile_info_cache.cc
@@ -134,9 +134,8 @@ void SaveBitmap(ImageData* data,
     return;
   }
 
-  if (file_util::WriteFile(image_path,
-                           reinterpret_cast<char*>(&(*data)[0]),
-                           data->size()) == -1) {
+  if (base::WriteFile(image_path, reinterpret_cast<char*>(&(*data)[0]),
+                      data->size()) == -1) {
     LOG(ERROR) << "Failed to save image to file.";
     return;
   }