[Autofill] Credit Card Assist Infobar

components/autofill/core/common/autofill_constants.h

Index: components/autofill/core/common/autofill_constants.h
diff --git a/components/autofill/core/common/autofill_constants.h b/components/autofill/core/common/autofill_constants.h
index ab092908f8963456b2a55ef570f811c5eaf3cbdd..872f697491bca8ffc4ab4d1bd1476a06a6b12e6b 100644
--- a/components/autofill/core/common/autofill_constants.h
+++ b/components/autofill/core/common/autofill_constants.h
@@ -32,6 +32,10 @@ const size_t kRequiredFieldsForUpload = 3;
 // upload the form to and request predictions from the Autofill servers.
 const size_t kRequiredFieldsForFormsWithOnlyPasswordFields = 2;
 
+// Special query id used between the browser and the renderer when the action
+// is initiated from the browser.
+const int kNoQueryId = -1;
+
 // Options bitmask values for AutofillHostMsg_ShowPasswordSuggestions IPC
 enum ShowPasswordSuggestionsOptions {
   SHOW_ALL = 1 << 0 /* show all credentials, not just ones matching username */,