Fix GCC build for target 'all'

components/dom_distiller/standalone/content_extractor_browsertest.cc

Index: components/dom_distiller/standalone/content_extractor_browsertest.cc
diff --git a/components/dom_distiller/standalone/content_extractor_browsertest.cc b/components/dom_distiller/standalone/content_extractor_browsertest.cc
index 459c3d341b40c29dc6bd6565586905417f82cccb..def3ac64804f243411b4382142247851448e1b57 100644
--- a/components/dom_distiller/standalone/content_extractor_browsertest.cc
+++ b/components/dom_distiller/standalone/content_extractor_browsertest.cc
@@ -125,9 +125,9 @@ std::unique_ptr<DomDistillerService> CreateDomDistillerService(
     content::BrowserContext* context,
     const base::FilePath& db_path,
     const FileToUrlMap& file_to_url_map) {
+  auto blocking_pool = content::BrowserThread::GetBlockingPool();
   scoped_refptr<base::SequencedTaskRunner> background_task_runner =
-      content::BrowserThread::GetBlockingPool()->GetSequencedTaskRunner(
-          content::BrowserThread::GetBlockingPool()->GetSequenceToken());
+      blocking_pool->GetSequencedTaskRunner(blocking_pool->GetSequenceToken());
 
   // TODO(cjhopman): use an in-memory database instead of an on-disk one with
   // temporary directory.