Use TaskScheduler instead of WorkerPool in headless_surface_factory.cc.

ui/ozone/platform/headless/headless_surface_factory.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/ozone/platform/headless/headless_surface_factory.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
-#include "base/threading/worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkSurface.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gfx/vsync_provider.h"
 #include "ui/ozone/platform/headless/headless_window.h"
 #include "ui/ozone/platform/headless/headless_window_manager.h"
 #include "ui/ozone/public/native_pixmap.h"
 #include "ui/ozone/public/surface_ozone_canvas.h"
 
@@ skipping 23 matching lines @@
   sk_sp<SkSurface> GetSurface() override { return surface_; }
   void PresentCanvas(const gfx::Rect& damage) override {
     if (location_.empty())
       return;
     SkBitmap bitmap;
     bitmap.setInfo(surface_->getCanvas()->imageInfo());
 
     // TODO(dnicoara) Use SkImage instead to potentially avoid a copy.
     // See crbug.com/361605 for details.
     if (surface_->getCanvas()->readPixels(&bitmap, 0, 0)) {
-      base::WorkerPool::PostTask(
-          FROM_HERE, base::Bind(&WriteDataToFile, location_, bitmap), true);
+      base::PostTaskWithTraits(
+          FROM_HERE, base::TaskTraits()
+                         .WithShutdownBehavior(
+                             base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
+                         .MayBlock(),
+          base::Bind(&WriteDataToFile, location_, bitmap));
     }
   }
   std::unique_ptr<gfx::VSyncProvider> CreateVSyncProvider() override {
     return nullptr;
   }
 
  private:
   base::FilePath location_;
   sk_sp<SkSurface> surface_;
 };
@@ skipping 51 matching lines @@
 
 scoped_refptr<NativePixmap> HeadlessSurfaceFactory::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
   return new TestPixmap(format);
 }
 
 }  // namespace ui