New FileSystemURL cracking

webkit/chromeos/fileapi/cros_mount_point_provider.cc

Index: webkit/chromeos/fileapi/cros_mount_point_provider.cc
diff --git a/webkit/chromeos/fileapi/cros_mount_point_provider.cc b/webkit/chromeos/fileapi/cros_mount_point_provider.cc
index 33bcbf16a963c378f7352d1d33ab3a4ab6025842..9a8aafb966289a14454ff07d6488728449a6570a 100644
--- a/webkit/chromeos/fileapi/cros_mount_point_provider.cc
+++ b/webkit/chromeos/fileapi/cros_mount_point_provider.cc
@@ -89,18 +89,21 @@ FilePath CrosMountPointProvider::GetFileSystemRootPathOnFileThread(
 
 bool CrosMountPointProvider::IsAccessAllowed(
     const fileapi::FileSystemURL& url) {
-  if (!CanHandleURL(url))
+  if (!url.is_valid())
     return false;
 
-  // No extra check is needed for isolated file systems.
-  if (url.mount_type() == fileapi::kFileSystemTypeIsolated)
-    return true;
-
   // Permit access to mount points from internal WebUI.
   const GURL& origin_url = url.origin();
   if (origin_url.SchemeIs(kChromeUIScheme))
     return true;
 
+  // No extra check is needed for isolated file systems.
+  if (url.mount_type() == fileapi::kFileSystemTypeIsolated)
+    return true;
+
+  if (!CanHandleURL(url))
+    return false;
+
   std::string extension_id = origin_url.host();
   // Check first to make sure this extension has fileBrowserHander permissions.
   if (!special_storage_policy_->IsFileHandler(extension_id))