Use ScopedTaskEnvironment instead of MessageLoop in tests that use v8.

extensions/renderer/api_binding_test.h

Index: extensions/renderer/api_binding_test.h
diff --git a/extensions/renderer/api_binding_test.h b/extensions/renderer/api_binding_test.h
index 41e2b050360dcb48f69cf4d4365508fd01432a6a..76e0f71626bba3a383c38f358a2311099481e05d 100644
--- a/extensions/renderer/api_binding_test.h
+++ b/extensions/renderer/api_binding_test.h
@@ -9,7 +9,7 @@
 #include <vector>
 
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "v8/include/v8.h"
 
@@ -58,7 +58,8 @@ class APIBindingTest : public testing::Test {
  private:
   void RunGarbageCollection();
 
-  base::MessageLoop message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
+
   std::unique_ptr<gin::IsolateHolder> isolate_holder_;
   std::unique_ptr<gin::ContextHolder> main_context_holder_;
   std::vector<std::unique_ptr<gin::ContextHolder>> additional_context_holders_;