WebView autofill implementation

components/autofill/core/common/form_data.h

Index: components/autofill/core/common/form_data.h
diff --git a/components/autofill/core/common/form_data.h b/components/autofill/core/common/form_data.h
index a4397fc2a2348e15be10c35e0663d27dd9fc8b05..fd4410cc8ddedeacc4d3a58336d8e61888caa12b 100644
--- a/components/autofill/core/common/form_data.h
+++ b/components/autofill/core/common/form_data.h
@@ -23,6 +23,11 @@ struct FormData {
   // form elements.
   bool SameFormAs(const FormData& other) const;
 
+  // Same as SameFormAs() except calling FormFieldData.SimilarFieldAs() to
+  // comparing fields, so we know forms are similar enough to be considered as
+  // same for autofill purpose.
+  bool SimilarFormAs(const FormData& other) const;
+
   // Note: operator==() performs a full-field-comparison(byte by byte), this is
   // different from SameFormAs(), which ignores comparison for those "values" of
   // all form fields, just like what FormFieldData::SameFieldAs() ignores.