cc: Change max_tiles_for_interest_rect to be screen pixels padding.

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 4a663cefaf5941e4761c966914bfdfa9b70d4179..891d08240484126d450131f20053566046d42518 100644
--- a/cc/tiles/tile_manager_unittest.cc
+++ b/cc/tiles/tile_manager_unittest.cc
@@ -1161,10 +1161,9 @@ TEST_F(TileManagerTilePriorityQueueTest,
 
   client.SetTileSize(gfx::Size(30, 30));
   LayerTreeSettings settings;
-  settings.max_tiles_for_interest_area = 10000;
 
   scoped_ptr<PictureLayerTilingSet> tiling_set = PictureLayerTilingSet::Create(
-      ACTIVE_TREE, &client, settings.max_tiles_for_interest_area,
+      ACTIVE_TREE, &client, settings.tiling_interest_area_padding,
       settings.skewport_target_time_in_seconds,
       settings.skewport_extrapolation_limit_in_content_pixels);
 
@@ -1271,10 +1270,9 @@ TEST_F(TileManagerTilePriorityQueueTest,
 
   client.SetTileSize(gfx::Size(30, 30));
   LayerTreeSettings settings;
-  settings.max_tiles_for_interest_area = 10000;
 
   scoped_ptr<PictureLayerTilingSet> tiling_set = PictureLayerTilingSet::Create(
-      ACTIVE_TREE, &client, settings.max_tiles_for_interest_area,
+      ACTIVE_TREE, &client, settings.tiling_interest_area_padding,
       settings.skewport_target_time_in_seconds,
       settings.skewport_extrapolation_limit_in_content_pixels);