Revert "Use TaskScheduler instead of WorkerPool in x11_hotplug_event_handler.cc."

content/browser/compositor/software_output_device_ozone_unittest.cc

Index: content/browser/compositor/software_output_device_ozone_unittest.cc
diff --git a/content/browser/compositor/software_output_device_ozone_unittest.cc b/content/browser/compositor/software_output_device_ozone_unittest.cc
index 4a099e07a2f886bbd0ae650e2560357b12bac911..703b68b8d1d4d39ebd57e27a29f950f8a9a65600 100644
--- a/content/browser/compositor/software_output_device_ozone_unittest.cc
+++ b/content/browser/compositor/software_output_device_ozone_unittest.cc
@@ -7,7 +7,7 @@
 #include <memory>
 
 #include "base/macros.h"
-#include "base/test/scoped_task_environment.h"
+#include "base/message_loop/message_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ -66,11 +66,11 @@ class SoftwareOutputDeviceOzoneTest : public testing::Test {
 
  protected:
   std::unique_ptr<content::SoftwareOutputDeviceOzone> output_device_;
-  bool enable_pixel_output_ = false;
+  bool enable_pixel_output_;
 
  private:
-  base::test::ScopedTaskEnvironment scoped_task_environment_;
   std::unique_ptr<ui::Compositor> compositor_;
+  std::unique_ptr<base::MessageLoop> message_loop_;
   TestPlatformWindowDelegate window_delegate_;
   std::unique_ptr<ui::PlatformWindow> window_;
 
@@ -78,8 +78,9 @@ class SoftwareOutputDeviceOzoneTest : public testing::Test {
 };
 
 SoftwareOutputDeviceOzoneTest::SoftwareOutputDeviceOzoneTest()
-    : scoped_task_environment_(
-          base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
+    : enable_pixel_output_(false) {
+  message_loop_.reset(new base::MessageLoopForUI);
+}
 
 SoftwareOutputDeviceOzoneTest::~SoftwareOutputDeviceOzoneTest() {
 }