Remove base::ScopedPtrHashMap from chrome/browser/sync_file_system/drive_backend/

chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc b/chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc
index acdb242094c308a931a5d656494b07867b36abd8..b971db1f29c43ff88ef072d43e154d13788c7744 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_task_manager.cc
@@ -201,7 +201,8 @@ bool SyncTaskManager::IsRunningTask(int64_t token_id) const {
   if (token_id == SyncTaskToken::kForegroundTaskTokenID)
     return true;
 
-  return ContainsKey(running_background_tasks_, token_id);
+  return running_background_tasks_.find(token_id) !=
+         running_background_tasks_.end();
 }
 
 void SyncTaskManager::DetachFromSequence() {
@@ -240,7 +241,8 @@ void SyncTaskManager::NotifyTaskDoneBody(std::unique_ptr<SyncTaskToken> token,
     token_ = std::move(token);
     task = std::move(running_foreground_task_);
   } else {
-    task = running_background_tasks_.take_and_erase(token->token_id());
+    task = std::move(running_background_tasks_[token->token_id()]);
+    running_background_tasks_.erase(token->token_id());
   }
 
   // Acquire the token to prevent a new task to jump into the queue.
@@ -343,8 +345,8 @@ void SyncTaskManager::UpdateTaskBlockerBody(
         weak_ptr_factory_.GetWeakPtr(), task_runner_.get(), task_token_seq_++,
         std::move(task_blocker));
     background_task_token->UpdateTask(from_here, callback);
-    running_background_tasks_.set(background_task_token->token_id(),
-                                  std::move(running_foreground_task_));
+    running_background_tasks_[background_task_token->token_id()] =
+        std::move(running_foreground_task_);
   }
 
   token_ = std::move(foreground_task_token);