cc: Remove code for drawing checkerboard quads, it's not used.

cc/quads/largest_draw_quad.cc

Index: cc/quads/largest_draw_quad.cc
diff --git a/cc/quads/largest_draw_quad.cc b/cc/quads/largest_draw_quad.cc
index 894be0fdbe49d704788c12d8fd3d3556e1c76085..b6526384887490692090ad4ba5e1778d129f8bb5 100644
--- a/cc/quads/largest_draw_quad.cc
+++ b/cc/quads/largest_draw_quad.cc
@@ -6,7 +6,6 @@
 
 #include <algorithm>
 
-#include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/io_surface_draw_quad.h"
 #include "cc/quads/picture_draw_quad.h"
@@ -33,9 +32,6 @@ size_t LargestDrawQuadSize() {
 
   // Use compile assert to make sure largest is actually larger than all other
   // type of draw quads.
-  static_assert(sizeof(CheckerboardDrawQuad) <= kLargestDrawQuadSize,
-                "Largest Draw Quad size needs update. CheckerboardDrawQuad is "
-                "currently largest.");
   static_assert(sizeof(DebugBorderDrawQuad) <= kLargestDrawQuadSize,
                 "Largest Draw Quad size needs update. DebugBorderDrawQuad is "
                 "currently largest.");