Integrate external mount points to IsolatedContext

webkit/fileapi/file_system_util.cc

Index: webkit/fileapi/file_system_util.cc
diff --git a/webkit/fileapi/file_system_util.cc b/webkit/fileapi/file_system_util.cc
index d77d7f39de233d2953d8506fb2d838d592480830..55c98a6e60f6c6d4f8816fcae2af8e5b14d86526 100644
--- a/webkit/fileapi/file_system_util.cc
+++ b/webkit/fileapi/file_system_util.cc
@@ -155,10 +155,13 @@ GURL GetFileSystemRootURI(const GURL& origin_url, FileSystemType type) {
   case kFileSystemTypeTest:
     url += (kTestDir + 1);  // We don't want the leading slash.
     return GURL(url + "/");
-  case kFileSystemTypeUnknown:
+  // Internal types are always pointed via isolated or external URLs.
+  case kFileSystemTypeDeviceMedia:
   case kFileSystemTypeDragged:
+  case kFileSystemTypeDrive:
+  case kFileSystemTypeNativeLocal:
   case kFileSystemTypeNativeMedia:
-  case kFileSystemTypeDeviceMedia:
+  case kFileSystemTypeUnknown:
     NOTREACHED();
   }
   NOTREACHED();