cc: Change preraster/predecode split to be half of max skewport extent.

cc/tiles/prioritized_tile.cc

Index: cc/tiles/prioritized_tile.cc
diff --git a/cc/tiles/prioritized_tile.cc b/cc/tiles/prioritized_tile.cc
index 526138bd8d1d37ee839204f8d81975e202768b36..37da3a98182406af088206e544bb6e644bc11c81 100644
--- a/cc/tiles/prioritized_tile.cc
+++ b/cc/tiles/prioritized_tile.cc
@@ -14,11 +14,13 @@ PrioritizedTile::PrioritizedTile() = default;
 PrioritizedTile::PrioritizedTile(Tile* tile,
                                  const PictureLayerTiling* source_tiling,
                                  const TilePriority priority,
-                                 bool is_occluded)
+                                 bool is_occluded,
+                                 bool is_process_for_images_only)
     : tile_(tile),
       source_tiling_(source_tiling),
       priority_(priority),
-      is_occluded_(is_occluded) {}
+      is_occluded_(is_occluded),
+      is_process_for_images_only_(is_process_for_images_only) {}
 
 PrioritizedTile::~PrioritizedTile() = default;