Move path functions from file_util to FilePath object.

chrome/browser/platform_util_win.cc

Index: chrome/browser/platform_util_win.cc
diff --git a/chrome/browser/platform_util_win.cc b/chrome/browser/platform_util_win.cc
index 4290009d75dc225c468f7a4534d9222d8f2bdac9..f0f6f07db2fc04b7f5c33ab17b2baab81fac3ec0 100644
--- a/chrome/browser/platform_util_win.cc
+++ b/chrome/browser/platform_util_win.cc
@@ -31,9 +31,9 @@ namespace {
 
 void ShowItemInFolderOnFileThread(const base::FilePath& full_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  base::FilePath dir = full_path.DirName();
+  base::FilePath dir = full_path.DirName().AsEndingWithSeparator();
   // ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
-  if (dir.value() == L"" || !file_util::EnsureEndsWithSeparator(&dir))
+  if (dir.empty())

[rvargas (doing something else), 2013/04/02 01:39:56]

The old code rejected empty paths while the new version continues.

We should probably make AsEndingWithSeparator fail for empty paths.

[brettw, 2013/04/08 23:40:20]

Good catch, I also added tests for this case.

     return;
 
   typedef HRESULT (WINAPI *SHOpenFolderAndSelectItemsFuncPtr)(