[Autofill] Make PersonalDataManager::OverwriteWith case sensitive.

components/autofill/core/browser/autofill_profile.h

Index: components/autofill/core/browser/autofill_profile.h
diff --git a/components/autofill/core/browser/autofill_profile.h b/components/autofill/core/browser/autofill_profile.h
index 735cc6aac68366b95654089739f727c52ea7e4c4..7935fbbae198c6b32ed6ef13bd6c4c603f1c833d 100644
--- a/components/autofill/core/browser/autofill_profile.h
+++ b/components/autofill/core/browser/autofill_profile.h
@@ -114,8 +114,8 @@ class AutofillProfile : public AutofillDataModel {
                              const std::string& app_locale,
                              const ServerFieldTypeSet& types) const;
 
-  // Overwrites the field data in |profile| with this Profile. Returns |true| if
-  // at least one field was overwritten.
+  // Overwrites the field data in this Profile with the non-empty ones in

[Mathieu, 2016/04/29 12:18:43]

nit: ones -> fields

[sebsg, 2016/04/29 15:04:49]

Done.

+  // |profile|. Returns |true| if at least one field was overwritten.

[Mathieu, 2016/04/29 12:18:43]

Should we add a note about how origin, language_code, use_count and use_date are
always updated and don't affect the return value?

[sebsg, 2016/04/29 15:04:49]

Done.

   bool OverwriteWith(const AutofillProfile& profile,
                      const std::string& app_locale);