[Autofill sync] Add logging info to debug flaky integration tests

This CL adds a few debug lines to investigate flakiness. There's no
behavioral change and the commit will get reverted once the
investigation is over.

Bug: 997629
Change-Id: I55a19c467affdaed1ed62ea8fb2545dc570b2877
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026734
Commit-Queue: Maxim Kolosovskiy <kolos@chromium.org>
Reviewed-by: Maxim Kolosovskiy <kolos@chromium.org>
Auto-Submit: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737264}

chrome/browser/sync/test/integration/autofill_helper.cc

@@ -292,6 +292,9 @@ void SetProfiles(int profile, std::vector<AutofillProfile>* autofill_profiles) {
   EXPECT_CALL(personal_data_observer, OnPersonalDataChanged())
       .Times(testing::AnyNumber());
 
+  // TODO(crbug.com/997629): Remove after investigation is over.
+  DLOG(WARNING) << "SetProfiles " << autofill_profiles->size();
+
   pdm->SetProfiles(autofill_profiles);
 
   run_loop.Run();

components/autofill/core/browser/personal_data_manager.cc

@@ -1502,10 +1502,16 @@ void PersonalDataManager::DedupeCreditCardToSuggest(
 }
 
 void PersonalDataManager::SetProfiles(std::vector<AutofillProfile>* profiles) {
-  if (is_off_the_record_)
+  if (is_off_the_record_) {
+    // TODO(crbug.com/997629): Remove after investigation is over.
+    DLOG(WARNING) << "Cannot SetProfiles because off-the-record";
     return;
-  if (!database_helper_->GetLocalDatabase())
+  }
+  if (!database_helper_->GetLocalDatabase()) {
+    // TODO(crbug.com/997629): Remove after investigation is over.
+    DLOG(WARNING) << "Cannot SetProfiles because no local DB";
     return;
+  }
 
   ClearOnGoingProfileChanges();