cc: Simplify task and its derived classes.

content/renderer/raster_worker_pool.cc

Index: content/renderer/raster_worker_pool.cc
diff --git a/content/renderer/raster_worker_pool.cc b/content/renderer/raster_worker_pool.cc
index 65c0014082744a7711a9588b0f1aeaf79cdc8ad5..d316474b5f6affd6ae142494733595e96aa6ef39 100644
--- a/content/renderer/raster_worker_pool.cc
+++ b/content/renderer/raster_worker_pool.cc
@@ -109,12 +109,12 @@ class RasterWorkerPool::RasterWorkerPoolSequencedTaskRunner
   // Namespace used to schedule tasks in the task graph runner.
   cc::NamespaceToken namespace_token_;
   // List of tasks currently queued up for execution.
-  cc::Task::Vector tasks_;
+  cc::DependencyTask::Vector tasks_;
   // Graph object used for scheduling tasks.
   cc::TaskGraph graph_;
   // Cached vector to avoid allocation when getting the list of complete
   // tasks.
-  cc::Task::Vector completed_tasks_;
+  cc::DependencyTask::Vector completed_tasks_;
 };
 
 RasterWorkerPool::RasterWorkerPool()
@@ -195,8 +195,9 @@ bool RasterWorkerPool::PostDelayedTask(
   DCHECK(completed_tasks_.empty());
   CollectCompletedTasksWithLockAcquired(namespace_token_, &completed_tasks_);
 
-  cc::Task::Vector::iterator end = std::remove_if(
-      tasks_.begin(), tasks_.end(), [this](const scoped_refptr<cc::Task>& e) {
+  cc::DependencyTask::Vector::iterator end = std::remove_if(
+      tasks_.begin(), tasks_.end(),
+      [this](const scoped_refptr<cc::DependencyTask>& e) {
         return std::find(this->completed_tasks_.begin(),
                          this->completed_tasks_.end(),
                          e) != this->completed_tasks_.end();
@@ -312,7 +313,7 @@ void RasterWorkerPool::WaitForTasksToFinishRunning(cc::NamespaceToken token) {
 
 void RasterWorkerPool::CollectCompletedTasks(
     cc::NamespaceToken token,
-    cc::Task::Vector* completed_tasks) {
+    cc::DependencyTask::Vector* completed_tasks) {
   TRACE_EVENT0("disabled-by-default-cc.debug",
                "RasterWorkerPool::CollectCompletedTasks");
 
@@ -324,7 +325,7 @@ void RasterWorkerPool::CollectCompletedTasks(
 
 void RasterWorkerPool::CollectCompletedTasksWithLockAcquired(
     cc::NamespaceToken token,
-    cc::Task::Vector* completed_tasks) {
+    cc::DependencyTask::Vector* completed_tasks) {
   DCHECK(token.IsValid());
   work_queue_.CollectCompletedTasks(token, completed_tasks);
 }
@@ -347,7 +348,7 @@ void RasterWorkerPool::RunTaskInCategoryWithLockAcquired(
   lock_.AssertAcquired();
 
   auto prioritized_task = work_queue_.GetNextTaskToRun(category);
-  cc::Task* task = prioritized_task.task;
+  cc::DependencyTask* task = prioritized_task.task;
 
   // There may be more work available, so wake up another worker thread.
   SignalHasReadyToRunTasksWithLockAcquired();