cc: Add tile pool to tile manager.

cc/resources/picture_layer_tiling_perftest.cc

Index: cc/resources/picture_layer_tiling_perftest.cc
diff --git a/cc/resources/picture_layer_tiling_perftest.cc b/cc/resources/picture_layer_tiling_perftest.cc
index 7a9b8dff4b44c67990089cf13cd36d226e6d7138..51dbd132e2803e2b5ec21a04d21fcb5c8f538141 100644
--- a/cc/resources/picture_layer_tiling_perftest.cc
+++ b/cc/resources/picture_layer_tiling_perftest.cc
@@ -146,6 +146,12 @@ TEST_F(PictureLayerTilingPerfTest, Invalidate) {
   Region one_tile(gfx::Rect(256, 256));
   RunInvalidateTest("1x1", one_tile);
 
+  Region screen_region(gfx::Rect(5 * 256, 5 * 256));
+  RunInvalidateTest("5x5", screen_region);
+
+  Region large_screen_region(gfx::Rect(15 * 256, 15 * 256));
+  RunInvalidateTest("15x15", large_screen_region);
+
   Region half_region(gfx::Rect(25 * 256, 50 * 256));
   RunInvalidateTest("25x50", half_region);