Do not start RunLoop of MessagePumpForUI in NestedMessagePumpAndroid

content/test/content_browser_test_test.cc

Index: content/test/content_browser_test_test.cc
diff --git a/content/test/content_browser_test_test.cc b/content/test/content_browser_test_test.cc
index 42a89013db258e7641e3887121483df30e2cd6b7..cba31c8bc6144e87170b9bb6f23463fb153777bc 100644
--- a/content/test/content_browser_test_test.cc
+++ b/content/test/content_browser_test_test.cc
@@ -9,6 +9,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
+#include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -47,4 +48,20 @@ IN_PROC_BROWSER_TEST_F(ContentBrowserTestSanityTest, SingleProcess) {
   Test();
 }
 
+namespace {
+
+void CallbackChecker(bool* non_nested_task_ran) {
+  *non_nested_task_ran = true;
+}
+
+}  // namespace
+
+IN_PROC_BROWSER_TEST_F(ContentBrowserTestSanityTest, NonNestableTask) {
+  bool non_nested_task_ran = false;
+  base::MessageLoop::current()->PostNonNestableTask(
+      FROM_HERE, base::Bind(&CallbackChecker, &non_nested_task_ran));
+  content::RunAllPendingInMessageLoop();
+  ASSERT_TRUE(non_nested_task_ran);
+}
+
 }  // namespace content