[Autofill] Only query for newly parsed forms

components/autofill/core/browser/autofill_download_manager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DOWNLOAD_MANAGER_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DOWNLOAD_MANAGER_H_
 
 #include <stddef.h>
 #include <list>
 #include <map>
@@ skipping 49 matching lines @@
   // |driver| and |pref_service| must outlive this instance.
   // |observer| - observer to notify on successful completion or error.
   AutofillDownloadManager(AutofillDriver* driver,
                           PrefService* pref_service,
                           Observer* observer);
   ~AutofillDownloadManager() override;
 
   // Starts a query request to Autofill servers. The observer is called with the
   // list of the fields of all requested forms.
   // |forms| - array of forms aggregated in this request.
-  bool StartQueryRequest(const std::vector<FormStructure*>& forms);
+  virtual bool StartQueryRequest(const std::vector<FormStructure*>& forms);
 
   // Starts an upload request for the given |form|, unless throttled by the
   // server. The probability of the request going over the wire is
   // GetPositiveUploadRate() if |form_was_autofilled| is true, or
   // GetNegativeUploadRate() otherwise. The observer will be called even if
   // there was no actual trip over the wire.
   // |available_field_types| should contain the types for which we have data
   // stored on the local client.
   // |login_form_signature| may be empty. It is non-empty when the user fills
   // and submits a login form using a generated password. In this case,
   // |login_form_signature| should be set to the submitted form's signature.
   // Note that in this case, |form.FormSignature()| gives the signature for the
   // registration form on which the password was generated, rather than the
   // submitted form's signature.
-  bool StartUploadRequest(const FormStructure& form,
-                          bool form_was_autofilled,
-                          const ServerFieldTypeSet& available_field_types,
-                          const std::string& login_form_signature);
+  virtual bool StartUploadRequest(
+      const FormStructure& form,
+      bool form_was_autofilled,
+      const ServerFieldTypeSet& available_field_types,
+      const std::string& login_form_signature);
 
  private:
   friend class AutofillDownloadTest;
   FRIEND_TEST_ALL_PREFIXES(AutofillDownloadTest, QueryAndUploadTest);
 
   struct FormRequestData;
   typedef std::list<std::pair<std::string, std::string> > QueryRequestCache;
 
   // Initiates request to Autofill servers to download/upload heuristics.
   // |form_xml| - form structure XML to upload/download.
@@ skipping 66 matching lines @@
   double positive_upload_rate_;
   double negative_upload_rate_;
 
   // Needed for unit-test.
   int fetcher_id_for_unittest_;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_DOWNLOAD_MANAGER_H_