Google drive forms should not appear in the "offline" tab of Files.app.

google_apis/drive/gdata_wapi_parser.h

Index: google_apis/drive/gdata_wapi_parser.h
diff --git a/google_apis/drive/gdata_wapi_parser.h b/google_apis/drive/gdata_wapi_parser.h
index 0c89c11b09ea9cc1c9614ca64350d086d9746f0d..a7ac493d2c6ceeec5ab5fcad190763c129256c68 100644
--- a/google_apis/drive/gdata_wapi_parser.h
+++ b/google_apis/drive/gdata_wapi_parser.h
@@ -509,6 +509,9 @@ class ResourceEntry : public CommonMetadata {
     KIND_OF_FILE = 1 << 4,
   };
 
+  // Returns the kind enum corresponding to the extension in form ".xxx".
+  static DriveEntryKind GetEntryKindFromExtension(const std::string& extension);
+
   // Classifies the EntryKind. The returned value is a bitmask of
   // EntryKindClass. For example, DOCUMENT is classified as
   // KIND_OF_HOSTED_DOCUMENT and KIND_OF_GOOGLE_DOCUMENT, hence the returned