Add category handling to RasterWorkerPool

content/renderer/raster_worker_pool_unittest.cc

Index: content/renderer/raster_worker_pool_unittest.cc
diff --git a/content/renderer/raster_worker_pool_unittest.cc b/content/renderer/raster_worker_pool_unittest.cc
index 7a402b76183b63b1bd1bb74fb0ac6e0399babdb9..3cecf53b1385f776f22a46ba6bf96b915ca1c413 100644
--- a/content/renderer/raster_worker_pool_unittest.cc
+++ b/content/renderer/raster_worker_pool_unittest.cc
@@ -20,7 +20,9 @@ class RasterWorkerPoolTestDelegate {
       : raster_worker_pool_(new content::RasterWorkerPool()) {}
 
   void StartTaskRunner() {
-    raster_worker_pool_->Start(kNumThreads, SimpleThread::Options());
+    raster_worker_pool_->Start(
+        kNumThreads, false /* use_single_thread_for_background_raster_tasks */,
+        SimpleThread::Options());
   }
 
   scoped_refptr<content::RasterWorkerPool> GetTaskRunner() {
@@ -45,7 +47,9 @@ class RasterWorkerPoolSequencedTestDelegate {
       : raster_worker_pool_(new content::RasterWorkerPool()) {}
 
   void StartTaskRunner() {
-    raster_worker_pool_->Start(kNumThreads, SimpleThread::Options());
+    raster_worker_pool_->Start(
+        kNumThreads, false /* use_single_thread_for_background_raster_tasks */,
+        SimpleThread::Options());
   }
 
   scoped_refptr<base::SequencedTaskRunner> GetTaskRunner() {
@@ -77,7 +81,9 @@ class RasterWorkerPoolTaskGraphRunnerTestDelegate {
       : raster_worker_pool_(new content::RasterWorkerPool()) {}
 
   void StartTaskGraphRunner() {
-    raster_worker_pool_->Start(NumThreads, base::SimpleThread::Options());
+    raster_worker_pool_->Start(
+        NumThreads, false /* use_single_thread_for_background_raster_tasks */,
+        base::SimpleThread::Options());
   }
 
   cc::TaskGraphRunner* GetTaskGraphRunner() {