[Sync] Remove kSyncPreventCommitsBypassingNudgeDelay switch

This CL cleans-up a kill switch for code successfully launched in M81.

Bug: 1022293
Change-Id: If05412a2e700fdc8132f36c00b6b0a92d42281c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2215803
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Auto-Submit: Jan Krcal <jkrcal@chromium.org>
Reviewed-by: Maksim Moskvitin <mmoskvitin@google.com>
Cr-Commit-Position: refs/heads/master@{#771765}

components/sync/engine/sync_engine_switches.cc

@@ -20,11 +20,4 @@ const base::Feature kSyncUseScryptForNewCustomPassphrases{
 const base::Feature kSyncSupportTrustedVaultPassphrase{
     "SyncSupportTrustedVaultPassphrase", base::FEATURE_ENABLED_BY_DEFAULT};
 
-// If enabled sync cycle ends by collecting contributions from all datatypes
-// and having less than max_commit_batch_size() entries to commit. If disabled
-// it ends when attempt to collect contributions returned no entries to commit.
-// TODO(crbug.com/1022293): Remove this flag after M82 or so.
-const base::Feature kSyncPreventCommitsBypassingNudgeDelay{
-    "SyncPreventCommitsBypassingNudgeDelay", base::FEATURE_ENABLED_BY_DEFAULT};
-
 }  // namespace switches

components/sync/engine/sync_engine_switches.h

@@ -12,7 +12,6 @@ namespace switches {
 extern const base::Feature kSyncResetPollIntervalOnStart;
 extern const base::Feature kSyncUseScryptForNewCustomPassphrases;
 extern const base::Feature kSyncSupportTrustedVaultPassphrase;
-extern const base::Feature kSyncPreventCommitsBypassingNudgeDelay;
 
 }  // namespace switches
 

components/sync/engine_impl/commit_processor.cc

@@ -8,7 +8,6 @@
 #include <utility>
 
 #include "base/metrics/histogram_macros.h"
-#include "components/sync/engine/sync_engine_switches.h"
 #include "components/sync/engine_impl/commit_contribution.h"
 #include "components/sync/engine_impl/commit_contributor.h"
 #include "components/sync/protocol/sync.pb.h"
@@ -33,9 +32,7 @@ Commit::ContributionMap CommitProcessor::GatherCommitContributions(
     size_t max_entries,
     bool cookie_jar_mismatch,
     bool cookie_jar_empty) {
-  if (gathered_all_contributions_ &&
-      base::FeatureList::IsEnabled(
-          switches::kSyncPreventCommitsBypassingNudgeDelay)) {
+  if (gathered_all_contributions_) {
     return Commit::ContributionMap();
   }