cc_perftests: Don't count number of tasks required for activation twice

cc/resources/raster_worker_pool_perftest.cc

Index: cc/resources/raster_worker_pool_perftest.cc
diff --git a/cc/resources/raster_worker_pool_perftest.cc b/cc/resources/raster_worker_pool_perftest.cc
index f22004798fb3f808bea62d7b154cae3a24cdd3e4..1a888a41ba2cb67229a9c13a7501fb0e13d18620 100644
--- a/cc/resources/raster_worker_pool_perftest.cc
+++ b/cc/resources/raster_worker_pool_perftest.cc
@@ -75,17 +75,10 @@ class PerfRasterWorkerPool : public RasterWorkerPool {
     unsigned priority = 0;
     TaskGraph graph;
 
-    size_t raster_tasks_required_for_activation_count = 0u;
-    for (RasterTaskVector::const_iterator it = raster_tasks().begin();
-         it != raster_tasks().end(); ++it) {
-      if (IsRasterTaskRequiredForActivation(it->get()))
-        raster_tasks_required_for_activation_count++;
-    }
-
     scoped_refptr<internal::WorkerPoolTask>
         raster_required_for_activation_finished_task(
             CreateRasterRequiredForActivationFinishedTask(
-                raster_tasks_required_for_activation_count));
+                raster_tasks_required_for_activation().size()));
     internal::GraphNode* raster_required_for_activation_finished_node =
         CreateGraphNodeForTask(
             raster_required_for_activation_finished_task.get(),