Move TaskGraph creation to TileManager

cc/tiles/tile_manager_perftest.cc

Index: cc/tiles/tile_manager_perftest.cc
diff --git a/cc/tiles/tile_manager_perftest.cc b/cc/tiles/tile_manager_perftest.cc
index 81213d45b3e98dae9ba5526f6cf373df76f2b5d8..e28f35ac7df01a1c7c363b7dd3fc5c3231fcc484 100644
--- a/cc/tiles/tile_manager_perftest.cc
+++ b/cc/tiles/tile_manager_perftest.cc
@@ -37,12 +37,10 @@ static const int kTimeCheckInterval = 10;
 class FakeTileTaskRunnerImpl : public TileTaskRunner, public TileTaskClient {
  public:
   // Overridden from TileTaskRunner:
-  void SetClient(TileTaskRunnerClient* client) override {}
   void Shutdown() override {}
-  void ScheduleTasks(TileTaskQueue* queue) override {
-    for (TileTaskQueue::Item::Vector::const_iterator it = queue->items.begin();
-         it != queue->items.end(); ++it) {
-      RasterTask* task = it->task;
+  void ScheduleTasks(TaskGraph* graph) override {
+    for (auto& node : graph->nodes) {
+      RasterTask* task = static_cast<RasterTask*>(node.task);
 
       task->WillSchedule();
       task->ScheduleOnOriginThread(this);