[SyncFS] Rename BlockingFactor to TaskBlocker

chrome/browser/sync_file_system/drive_backend/sync_task.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_task.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_task.cc b/chrome/browser/sync_file_system/drive_backend/sync_task.cc
index 4475059193aacdf3ad9b4e70e2918becc3f20a04..f5f7dac7f375570e341e81b3c4d2256927a5cc65 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_task.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_task.cc
@@ -26,11 +26,11 @@ ExclusiveTask::ExclusiveTask() : weak_ptr_factory_(this) {}
 ExclusiveTask::~ExclusiveTask() {}
 
 void ExclusiveTask::RunPreflight(scoped_ptr<SyncTaskToken> token) {
-  scoped_ptr<BlockingFactor> blocking_factor(new BlockingFactor);
-  blocking_factor->exclusive = true;
+  scoped_ptr<TaskBlocker> task_blocker(new TaskBlocker);
+  task_blocker->exclusive = true;
 
-  SyncTaskManager::UpdateBlockingFactor(
-      token.Pass(), blocking_factor.Pass(),
+  SyncTaskManager::UpdateTaskBlocker(
+      token.Pass(), task_blocker.Pass(),
       base::Bind(&CallRunExclusive, weak_ptr_factory_.GetWeakPtr()));
 }