Move common file path related methods between chrome & content to file_util. I reduced the 4 meth...

chrome/browser/download/download_util.cc

Index: chrome/browser/download/download_util.cc
===================================================================
--- chrome/browser/download/download_util.cc	(revision 119906)
+++ chrome/browser/download/download_util.cc	(working copy)
@@ -593,12 +593,12 @@
 #endif
 
 int GetUniquePathNumberWithCrDownload(const FilePath& path) {
-  return DownloadFile::GetUniquePathNumberWithSuffix(
+  return file_util::GetUniquePathNumber(
       path, FILE_PATH_LITERAL(".crdownload"));
 }
 
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
-  return DownloadFile::AppendSuffixToPath(
+  return file_util::AppendSuffixToPath(
       suggested_path, FILE_PATH_LITERAL(".crdownload"));
 }