Add initial code to do filename munging in the FileSystem....

webkit/fileapi/file_system_path_manager.cc

Index: webkit/fileapi/file_system_path_manager.cc
===================================================================
--- webkit/fileapi/file_system_path_manager.cc	(revision 74905)
+++ webkit/fileapi/file_system_path_manager.cc	(working copy)
@@ -222,7 +222,7 @@
 
 bool FileSystemPathManager::CrackFileSystemPath(
     const FilePath& path, GURL* origin_url, FileSystemType* type,
-    FilePath* virtual_path) const {
+    FilePath* root, FilePath* virtual_path) const {
   // Any paths that includes parent references are considered invalid.
   if (path.ReferencesParent())
     return false;
@@ -275,6 +275,13 @@
   if (type)
     *type = cracked_type;
 
+  if (root) {
+    FilePath temp = base_path_;
+    temp = temp.Append(components[0]);
+    temp = temp.Append(components[1]);
+    *root = temp.Append(components[2]);
+  }
+
   if (virtual_path) {
     virtual_path->clear();
     for (size_t i = 3; i < components.size(); ++i)