[rAc Android dialog] Stubs for Autofill dialog integration.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index bdbb3466567a61f501df9918e7bd8e388f300b69..1cce51f91a9113575dfb49793ccf1ed4c72cac16 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1157,6 +1157,10 @@ const char kAutofillDialogShowCount[] = "autofill.show_count";
 const char kAutofillGeneratedCardBubbleTimesShown[] =
     "autofill.generated_card_bubble_times_shown";
 
+// A dictionary that tracks the defaults to be set on the next invocation
+// of the requestAutocomplete/Autocheckout dialog.
+const char kAutofillDialogDefaults[] = "autofill.rac_dialog_defaults";
+
 // Modifying bookmarks is completely disabled when this is set to false.
 const char kEditBookmarksEnabled[] = "bookmarks.editing_enabled";