Integrate external mount points to IsolatedContext

chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc

Index: chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
index 08d0937feee080b6f304b17b73df976fd8d8f259..111ccb5e686f84e5c0d3628bd72a620136d32d0b 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system_proxy.cc
@@ -639,10 +639,10 @@ GDataFileSystemProxy::~GDataFileSystemProxy() {
 bool GDataFileSystemProxy::ValidateUrl(
     const FileSystemURL& url, FilePath* file_path) {
   // what platform you're on.
-  if (!url.is_valid() || url.type() != fileapi::kFileSystemTypeExternal) {
+  if (!url.is_valid() || url.type() != fileapi::kFileSystemTypeDrive) {
     return false;
   }
-  *file_path = url.path();
+  *file_path = url.virtual_path();
   return true;
 }