Add TaskPriority as a parameter to SequencedWorkerPool in preparation for TaskScheduler experiment.

base/trace_event/memory_dump_manager_unittest.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 "base/trace_event/memory_dump_manager.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
@@ skipping 129 matching lines @@
     if (enable_mock_destructor)
       Destructor();
   }
 
   bool enable_mock_destructor;
 };
 
 class TestSequencedTaskRunner : public SequencedTaskRunner {
  public:
   TestSequencedTaskRunner()
-      : worker_pool_(
-            new SequencedWorkerPool(2 /* max_threads */, "Test Task Runner")),
+      : worker_pool_(new SequencedWorkerPool(2 /* max_threads */,
+                                             "Test Task Runner",
+                                             base::TaskPriority::USER_VISIBLE)),
         enabled_(true),
         num_of_post_tasks_(0) {}
 
   void set_enabled(bool value) { enabled_ = value; }
   unsigned no_of_post_tasks() const { return num_of_post_tasks_; }
 
   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
                                   const Closure& task,
                                   TimeDelta delay) override {
     NOTREACHED();
@@ skipping 1000 matching lines @@
                            MemoryDumpLevelOfDetail::DETAILED);
   EXPECT_FALSE(last_callback_success_);
 
   ASSERT_TRUE(IsPeriodicDumpingEnabled());
   run_loop.Run();
   DisableTracing();
 }
 
 }  // namespace trace_event
 }  // namespace base