[Sync] Remove special cased sessions default commit

components/sync/engine_impl/cycle/nudge_tracker.cc

Index: components/sync/engine_impl/cycle/nudge_tracker.cc
diff --git a/components/sync/engine_impl/cycle/nudge_tracker.cc b/components/sync/engine_impl/cycle/nudge_tracker.cc
index e8de465ceecc32fb5a407e0af3ad36debb793937..324a28f4fe15c585c1950aa5804cd12825518c07 100644
--- a/components/sync/engine_impl/cycle/nudge_tracker.cc
+++ b/components/sync/engine_impl/cycle/nudge_tracker.cc
@@ -19,7 +19,6 @@ namespace {
 // Delays for syncer nudges.
 const int kDefaultNudgeDelayMilliseconds = 200;
 const int kSlowNudgeDelayMilliseconds = 2000;
-const int kDefaultSessionsCommitDelaySeconds = 10;
 const int kSyncRefreshDelayMilliseconds = 500;
 const int kSyncSchedulerDelayMilliseconds = 250;
 
@@ -32,15 +31,12 @@ base::TimeDelta GetDefaultDelayForType(ModelType model_type,
       return base::TimeDelta::FromSeconds(kDefaultShortPollIntervalSeconds);
     case BOOKMARKS:
     case PREFERENCES:
-      // Types with sometimes automatic changes get longer delays to allow more
-      // coalescing.
-      return base::TimeDelta::FromMilliseconds(kSlowNudgeDelayMilliseconds);
     case SESSIONS:
     case FAVICON_IMAGES:
     case FAVICON_TRACKING:
-      // Types with navigation triggered changes get longer delays to allow more
+      // Types with sometimes automatic changes get longer delays to allow more
       // coalescing.
-      return base::TimeDelta::FromSeconds(kDefaultSessionsCommitDelaySeconds);
+      return base::TimeDelta::FromMilliseconds(kSlowNudgeDelayMilliseconds);
     default:
       return minimum_delay;
   }