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

cc/output/software_renderer.cc

 // Copyright 2012 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.
 
 #include "cc/output/software_renderer.h"
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/render_surface_filters.h"
 #include "cc/output/software_output_device.h"
-#include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/picture_draw_quad.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "skia/ext/opacity_filter_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
@@ skipping 269 matching lines @@
 
     SkPoint clip_points[4];
     QuadFToSkPoints(local_draw_region, clip_points);
     draw_region_clip_path.addPoly(clip_points, 4, true);
 
     current_canvas_->clipPath(draw_region_clip_path, SkRegion::kIntersect_Op,
                               false);
   }
 
   switch (quad->material) {
-    case DrawQuad::CHECKERBOARD:
-      // TODO(enne) For now since checkerboards shouldn't be part of a 3D
-      // context, clipping regions aren't supported so we skip drawing them
-      // if this becomes the case.
-      if (!draw_region) {
-        DrawCheckerboardQuad(frame, CheckerboardDrawQuad::MaterialCast(quad));
-      }
-      break;
     case DrawQuad::DEBUG_BORDER:
       DrawDebugBorderQuad(frame, DebugBorderDrawQuad::MaterialCast(quad));
       break;
     case DrawQuad::PICTURE_CONTENT:
       DrawPictureQuad(frame, PictureDrawQuad::MaterialCast(quad));
       break;
     case DrawQuad::RENDER_PASS:
       DrawRenderPassQuad(frame, RenderPassDrawQuad::MaterialCast(quad));
       break;
     case DrawQuad::SOLID_COLOR:
@@ skipping 18 matching lines @@
       NOTREACHED();
       break;
   }
 
   current_canvas_->resetMatrix();
   if (draw_region) {
     current_canvas_->restore();
   }
 }
 
-void SoftwareRenderer::DrawCheckerboardQuad(const DrawingFrame* frame,
-                                            const CheckerboardDrawQuad* quad) {
-  gfx::RectF visible_quad_vertex_rect = MathUtil::ScaleRectProportional(
-      QuadVertexRect(), quad->rect, quad->visible_rect);
-  current_paint_.setColor(quad->color);
-  current_paint_.setAlpha(quad->shared_quad_state->opacity);
-  current_canvas_->drawRect(gfx::RectFToSkRect(visible_quad_vertex_rect),
-                            current_paint_);
-}
-
 void SoftwareRenderer::DrawDebugBorderQuad(const DrawingFrame* frame,
                                            const DebugBorderDrawQuad* quad) {
   // We need to apply the matrix manually to have pixel-sized stroke width.
   SkPoint vertices[4];
   gfx::RectFToSkRect(QuadVertexRect()).toQuad(vertices);
   SkPoint transformed_vertices[4];
   current_canvas_->getTotalMatrix().mapPoints(transformed_vertices,
                                               vertices,
                                               4);
   current_canvas_->resetMatrix();
@@ skipping 282 matching lines @@
 }
 
 void SoftwareRenderer::DidChangeVisibility() {
   if (visible())
     EnsureBackbuffer();
   else
     DiscardBackbuffer();
 }
 
 }  // namespace cc