Remove implicit conversions from scoped_refptr to T* in chrome/browser/sync_file_system/

chrome/browser/sync_file_system/drive_backend/sync_task_token.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc b/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
index 1eff6c515d95435e4e8a74ecedbec4d2beafcb57..624cefc32fbbb6d74c99ce75d899fd2235d98c11 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_task_token.cc
@@ -68,16 +68,18 @@ SyncTaskToken::~SyncTaskToken() {
   // it must return the token to TaskManager.
   // Destroying a token with valid |client| indicates the token was
   // dropped by a task without returning.
-  if (task_runner_ && task_runner_->RunsTasksOnCurrentThread() &&
+  if (task_runner_.get() && task_runner_->RunsTasksOnCurrentThread() &&
       manager_ && manager_->IsRunningTask(token_id_)) {
     NOTREACHED()
         << "Unexpected TaskToken deletion from: " << location_.ToString();
 
     // Reinitializes the token.
     SyncTaskManager::NotifyTaskDone(
-        make_scoped_ptr(new SyncTaskToken(
-            manager_, task_runner_, token_id_, blocking_factor_.Pass(),
-            SyncStatusCallback())),
+        make_scoped_ptr(new SyncTaskToken(manager_,
+                                          task_runner_.get(),
+                                          token_id_,
+                                          blocking_factor_.Pass(),
+                                          SyncStatusCallback())),
         SYNC_STATUS_OK);
   }
 }