Early exit from autofill profile de-duplication if <2 profiles.

components/autofill/core/browser/personal_data_manager.cc

 // Copyright 2013 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.
 
 #include "components/autofill/core/browser/personal_data_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 1632 matching lines @@
     SetProfiles(&profiles);
 }
 
 bool PersonalDataManager::ApplyDedupingRoutine() {
   if (!is_autofill_profile_dedupe_pending_)
     return false;
 
   DCHECK(IsAutofillProfileCleanupEnabled());
   is_autofill_profile_dedupe_pending_ = false;
 
-  // Check if the deduping routine has already been run on this major version.
+  // No need to de-duplicate if there are less than two profiles.
+  if (web_profiles_.get().size() < 2) {
+    DVLOG(1) << "Autofill profile de-duplication not needed.";
+    return false;
+  }
+
+  // Check if de-duplication has already been performed this major version.
   int current_major_version = atoi(version_info::GetVersionNumber().c_str());
   if (pref_service_->GetInteger(prefs::kAutofillLastVersionDeduped) >=
       current_major_version) {
     DVLOG(1)
         << "Autofill profile de-duplication already performed for this version";
     return false;
   }
 
   DVLOG(1) << "Starting autofill profile de-duplication.";
   std::vector<AutofillProfile*> existing_profiles = web_profiles_.get();
@@ skipping 92 matching lines @@
         if (profile_to_merge->IsVerified())
           break;
       }
     }
   }
   AutofillMetrics::LogNumberOfProfilesRemovedDuringDedupe(
       profiles_to_delete->size());
 }
 
 }  // namespace autofill