Move browsing_data counter sync tests to separate file

components/browsing_data/core/counters/autofill_counter.h

Index: components/browsing_data/core/counters/autofill_counter.h
diff --git a/components/browsing_data/core/counters/autofill_counter.h b/components/browsing_data/core/counters/autofill_counter.h
index dc59825c872cb8b6746b5378589a308df7a944bb..7352a0c4f6810b5377425b9bc9e5ec63b6345a12 100644
--- a/components/browsing_data/core/counters/autofill_counter.h
+++ b/components/browsing_data/core/counters/autofill_counter.h
@@ -23,7 +23,7 @@ class AutofillCounter : public browsing_data::BrowsingDataCounter,
                         public WebDataServiceConsumer,
                         public syncer::SyncServiceObserver {
  public:
-  class AutofillResult : public FinishedResult {
+  class AutofillResult : public SyncResult {
    public:
     AutofillResult(const AutofillCounter* source,
                    ResultInt num_suggestions,
@@ -34,12 +34,10 @@ class AutofillCounter : public browsing_data::BrowsingDataCounter,
 
     ResultInt num_credit_cards() const { return num_credit_cards_; }
     ResultInt num_addresses() const { return num_addresses_; }
-    bool autofill_sync_enabled() const { return autofill_sync_enabled_; }
 
    private:
     ResultInt num_credit_cards_;
     ResultInt num_addresses_;
-    bool autofill_sync_enabled_;
 
     DISALLOW_COPY_AND_ASSIGN(AutofillResult);
   };