Stop returning the true root path of each filesystem from openFileSystem....

content/common/common_param_traits.cc

Index: content/common/common_param_traits.cc
===================================================================
--- content/common/common_param_traits.cc	(revision 78772)
+++ content/common/common_param_traits.cc	(working copy)
@@ -473,6 +473,7 @@
   WriteParam(m, p.last_modified.ToDoubleT());
   WriteParam(m, p.last_accessed.ToDoubleT());
   WriteParam(m, p.creation_time.ToDoubleT());
+  WriteParam(m, p.path);
 }
 
 bool ParamTraits<base::PlatformFileInfo>::Read(
@@ -485,7 +486,8 @@
       ReadParam(m, iter, &p->is_directory) &&
       ReadParam(m, iter, &last_modified) &&
       ReadParam(m, iter, &last_accessed) &&
-      ReadParam(m, iter, &creation_time);
+      ReadParam(m, iter, &creation_time) &&
+      ReadParam(m, iter, &p->path);
   if (result) {
     p->last_modified = base::Time::FromDoubleT(last_modified);
     p->last_accessed = base::Time::FromDoubleT(last_accessed);
@@ -506,6 +508,8 @@
   LogParam(p.last_accessed.ToDoubleT(), l);
   l->append(",");
   LogParam(p.creation_time.ToDoubleT(), l);
+  l->append(",");
+  LogParam(p.path, l);
   l->append(")");
 }