[Autofill] Move new sectioning method to a separate function

Change-Id: I1f3f102bd03d2fa60bf5195403a00e39fc6f3125
Bug: 1007974
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566949
Commit-Queue: Matthias Körber <koerber@google.com>
Commit-Queue: Christoph Schwering <schwering@google.com>
Reviewed-by: Christoph Schwering <schwering@google.com>
Cr-Commit-Position: refs/heads/master@{#833110}

components/autofill/core/browser/form_structure.h

@@ -550,6 +550,7 @@ class FormStructure {
   // If |has_author_specified_sections| is true, only the second pass --
   // distinguishing credit card sections from non-credit card ones -- is made.
   void IdentifySections(bool has_author_specified_sections);
+  void IdentifySectionsWithNewMethod();
 
   // Returns true if field should be skipped when talking to Autofill server.
   bool ShouldSkipField(const FormFieldData& field) const;