base: Refactor PendingTask out of MessageLoop.

base/threading/worker_pool_posix.h

Index: base/threading/worker_pool_posix.h
diff --git a/base/threading/worker_pool_posix.h b/base/threading/worker_pool_posix.h
index 2cc1150e1612a4b5748bd27b0a1b1974ab792775..48c08980008cb58dcce27855ac98002411d7fa90 100644
--- a/base/threading/worker_pool_posix.h
+++ b/base/threading/worker_pool_posix.h
@@ -34,6 +34,7 @@
 #include "base/time.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/pending_task.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"
@@ -48,23 +49,6 @@ class BASE_EXPORT PosixDynamicThreadPool
  public:
   class PosixDynamicThreadPoolPeer;
 
-  struct PendingTask {
-    PendingTask(const tracked_objects::Location& posted_from,
-                const base::Closure& task);
-    ~PendingTask();
-
-    // Counter for location where the Closure was posted from.
-    tracked_objects::Births* birth_tally;
-
-    // Time the task was posted.
-    tracked_objects::TrackedTime time_posted;
-
-    const tracked_objects::Location posted_from;
-
-    // The task to run.
-    base::Closure task;
-  };
-
   // All worker threads will share the same |name_prefix|.  They will exit after
   // |idle_seconds_before_exit|.
   PosixDynamicThreadPool(const std::string& name_prefix,
@@ -88,14 +72,14 @@ class BASE_EXPORT PosixDynamicThreadPool
 
   // Worker thread method to wait for up to |idle_seconds_before_exit| for more
   // work from the thread pool.  Returns NULL if no work is available.
-  PendingTask WaitForTask();
+  base::PendingTask WaitForTask();
 
  private:
   friend class PosixDynamicThreadPoolPeer;
 
   // Adds pending_task to the thread pool.  This function will clear
   // |pending_task->task|.
-  void AddTask(PendingTask* pending_task);
+  void AddTask(base::PendingTask* pending_task);
 
   const std::string name_prefix_;
   const int idle_seconds_before_exit_;
@@ -107,7 +91,7 @@ class BASE_EXPORT PosixDynamicThreadPool
   // is being deleted and they can exit.
   ConditionVariable pending_tasks_available_cv_;
   int num_idle_threads_;
-  std::queue<PendingTask> pending_tasks_;
+  TaskQueue pending_tasks_;
   bool terminated_;
   // Only used for tests to ensure correct thread ordering.  It will always be
   // NULL in non-test code.