TaskScheduler: Change Sequence::PeekTask to Sequence::TakeTask.

base/task_scheduler/task_tracker.cc

Index: base/task_scheduler/task_tracker.cc
diff --git a/base/task_scheduler/task_tracker.cc b/base/task_scheduler/task_tracker.cc
index eeb8e39a41526d49f040d066c4819da5cc18a66a..68e606b232c2bb757146fe86bd1ec1f82779f63f 100644
--- a/base/task_scheduler/task_tracker.cc
+++ b/base/task_scheduler/task_tracker.cc
@@ -205,7 +205,7 @@ bool TaskTracker::WillPostTask(const Task* task) {
   return true;
 }
 
-bool TaskTracker::RunTask(const Task* task,
+bool TaskTracker::RunTask(std::unique_ptr<Task> task,
                           const SequenceToken& sequence_token) {
   DCHECK(task);
   DCHECK(sequence_token.IsValid());