Do some cleanup of file path name handling.

chrome/browser/views/tab_contents/tab_contents_view_win.cc

Index: chrome/browser/views/tab_contents/tab_contents_view_win.cc
===================================================================
--- chrome/browser/views/tab_contents/tab_contents_view_win.cc	(revision 29772)
+++ chrome/browser/views/tab_contents/tab_contents_view_win.cc	(working copy)
@@ -138,10 +138,12 @@
     file_name = file_name.BaseName().RemoveExtension();
     if (file_name.value().empty()) {
       // Retrieve the name from the URL.
-      std::wstring fn = net::GetSuggestedFilename(drop_data.url, "", "", L"");
-      if ((fn.size() + drop_data.file_extension.size() + 1) > MAX_PATH)
-        fn = fn.substr(0, MAX_PATH - drop_data.file_extension.size() - 2);
-      file_name = FilePath::FromWStringHack(fn);
+      file_name = net::GetSuggestedFilename(drop_data.url, "", "", "");
+      if (file_name.value().size() + drop_data.file_extension.size() + 1 >
+          MAX_PATH) {
+        file_name = FilePath(file_name.value().substr(
+            0, MAX_PATH - drop_data.file_extension.size() - 2));
+      }
     }
     file_name = file_name.ReplaceExtension(drop_data.file_extension);
     data.SetFileContents(file_name.value(), drop_data.file_contents);