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

components/view_manager/public/interfaces/quads.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module mojo;
 
 import "components/view_manager/public/interfaces/surface_id.mojom";
 import "ui/mojo/geometry/geometry.mojom";
 
 struct Color {
@@ skipping 91 matching lines @@
   Size ya_tex_size;
   Size uv_tex_size;
   uint32 y_plane_resource_id;
   uint32 u_plane_resource_id;
   uint32 v_plane_resource_id;
   uint32 a_plane_resource_id;
   YUVColorSpace color_space;
 };
 
 enum Material {
-  CHECKERBOARD = 1,
-  DEBUG_BORDER,
+  DEBUG_BORDER = 1,
   IO_SURFACE_CONTENT,
   PICTURE_CONTENT,
   RENDER_PASS,
   SOLID_COLOR,
   STREAM_VIDEO_CONTENT,
   SURFACE_CONTENT,
   TEXTURE_CONTENT,
   TILED_CONTENT,
   YUV_VIDEO_CONTENT,
 };
@@ skipping 96 matching lines @@
 
 struct Pass {
   RenderPassId id;
   Rect output_rect;
   Rect damage_rect;
   Transform transform_to_root_target;
   bool has_transparent_background;
   array<Quad> quads;
   array<SharedQuadState> shared_quad_states;
 };