CFI: fix invalid cast in tile_manager_unittest.cc.

cc/tiles/tile_manager_unittest.cc

Index: cc/tiles/tile_manager_unittest.cc
diff --git a/cc/tiles/tile_manager_unittest.cc b/cc/tiles/tile_manager_unittest.cc
index 795118f315dae9b78de34806cdeae6edc57e5fbc..2c69999b235a91880aff8e07dc63f6a6682415ce 100644
--- a/cc/tiles/tile_manager_unittest.cc
+++ b/cc/tiles/tile_manager_unittest.cc
@@ -1730,7 +1730,7 @@ class CancellingTileTaskRunner : public FakeTileTaskRunner {
     // Just call CompleteOnOriginThread on each item in the queue. As none of
     // these items have run yet, they will be treated as cancelled tasks.
     for (const auto& node : graph->nodes) {
-      static_cast<RasterTask*>(node.task)->CompleteOnOriginThread(this);
+      static_cast<TileTask*>(node.task)->CompleteOnOriginThread(this);
     }
   }
 };
@@ -1805,7 +1805,7 @@ class VerifyResourceContentIdTileTaskRunner : public FakeTileTaskRunner {
 
   void ScheduleTasks(TaskGraph* graph) override {
     for (const auto& node : graph->nodes) {
-      RasterTask* task = static_cast<RasterTask*>(node.task);
+      TileTask* task = static_cast<TileTask*>(node.task);
       // Triggers a call to AcquireBufferForRaster.
       task->ScheduleOnOriginThread(this);
       // Calls TileManager as though task was cancelled.