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

cc/tiles/picture_layer_tiling_unittest.cc

Index: cc/tiles/picture_layer_tiling_unittest.cc
diff --git a/cc/tiles/picture_layer_tiling_unittest.cc b/cc/tiles/picture_layer_tiling_unittest.cc
index 19e5f27896b53bbd9addd2d95a2d2ab4d251f761..e3bd366e7ea3285e5957dd3958b0774f9c40d6a9 100644
--- a/cc/tiles/picture_layer_tiling_unittest.cc
+++ b/cc/tiles/picture_layer_tiling_unittest.cc
@@ -55,7 +55,9 @@ class TestablePictureLayerTiling : public PictureLayerTiling {
         tree, contents_scale, raster_source, client,
         settings.tiling_interest_area_padding,
         settings.skewport_target_time_in_seconds,
-        settings.skewport_extrapolation_limit_in_screen_pixels));
+        settings.skewport_extrapolation_limit_in_screen_pixels,
+        312.f, /* min_preraster_distance */
+        settings.max_preraster_distance_in_screen_pixels));
   }
 
   gfx::Rect live_tiles_rect() const { return live_tiles_rect_; }
@@ -70,8 +72,15 @@ class TestablePictureLayerTiling : public PictureLayerTiling {
                              PictureLayerTilingClient* client,
                              size_t tiling_interest_area_padding,
                              float skewport_target_time,
-                             int skewport_extrapolation_limit)
-      : PictureLayerTiling(tree, contents_scale, raster_source, client) {}
+                             int skewport_extrapolation_limit,
+                             float min_preraster_distance,
+                             float max_preraster_distance)
+      : PictureLayerTiling(tree,
+                           contents_scale,
+                           raster_source,
+                           client,
+                           min_preraster_distance,
+                           max_preraster_distance) {}
 };
 
 class PictureLayerTilingIteratorTest : public testing::Test {