Revert of Disable flaky DestructiveScriptTest.MacrotaskRemoval

chrome/browser/extensions/execute_script_apitest.cc

Index: chrome/browser/extensions/execute_script_apitest.cc
diff --git a/chrome/browser/extensions/execute_script_apitest.cc b/chrome/browser/extensions/execute_script_apitest.cc
index 85065ba85c834b31c03ce69e909063b2fb5114c8..ca31131d6773f01e2d1f3cb34d42a1acb6381bda 100644
--- a/chrome/browser/extensions/execute_script_apitest.cc
+++ b/chrome/browser/extensions/execute_script_apitest.cc
@@ -135,8 +135,7 @@
 }
 
 // Removes the frame at the frame's first scheduled macrotask.
-// Test is flaky. crbug.com/722703
-IN_PROC_BROWSER_TEST_P(DestructiveScriptTest, DISABLED_MacrotaskRemoval) {
+IN_PROC_BROWSER_TEST_P(DestructiveScriptTest, MacrotaskRemoval) {
   ASSERT_TRUE(RunSubtest("macrotask")) << message_;
 }