Revert "cc: Make tiling interest rect calc based on viewport."

cc/trees/layer_tree_settings.cc

Index: cc/trees/layer_tree_settings.cc
diff --git a/cc/trees/layer_tree_settings.cc b/cc/trees/layer_tree_settings.cc
index 2c78c51937f0c7ed105e20e12925864a04868ef3..4e2dd667d7fa3ce47711aa59095a5a49c74ca9de 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -52,7 +52,10 @@ LayerTreeSettings::LayerTreeSettings()
       max_untiled_layer_size(gfx::Size(512, 512)),
       default_tile_grid_size(gfx::Size(256, 256)),
       minimum_occlusion_tracking_size(gfx::Size(160, 160)),
-      tiling_interest_area_viewport_multiplier(9.0f),
+      use_pinch_zoom_scrollbars(false),
+      use_pinch_virtual_viewport(false),
+      // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
+      max_tiles_for_interest_area(128),
       skewport_target_time_in_seconds(1.0f),
       skewport_extrapolation_limit_in_content_pixels(2000),
       max_unused_resource_memory_percentage(100),