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 ce8445e19375183bf17f05c142730448a8d00422..9123e45ad3ab0632afc9b63d721daf1994c7be85 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -53,8 +53,8 @@ LayerTreeSettings::LayerTreeSettings()
       minimum_occlusion_tracking_size(gfx::Size(160, 160)),
       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),
+      // Viewport distance in all directions.

[vmpstr, 2015/05/06 17:57:29]

I don't think you need this comment.

[sohanjg, 2015/05/07 14:42:10]

Done.

+      tiling_interest_area_viewport_multiplier(9),
       skewport_target_time_in_seconds(1.0f),
       skewport_extrapolation_limit_in_content_pixels(2000),
       max_unused_resource_memory_percentage(100),