Remove unused checkerboard.cc (#2865)

flow/BUILD.gn

@@ -4,8 +4,6 @@
 
 source_set("flow") {
   sources = [
-    "checkerboard.cc",
-    "checkerboard.h",
     "compositor_context.cc",
     "compositor_context.h",
     "instrumentation.cc",

flow/checkerboard.cc

-// Copyright 2015 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 "flow/checkerboard.h"
-
-#include "third_party/skia/include/core/SkShader.h"
-
-namespace flow {
-
-static sk_sp<SkShader> CreateCheckerboardShader(SkColor c1,
-                                                SkColor c2,
-                                                int size) {
-  SkBitmap bm;
-  bm.allocN32Pixels(2 * size, 2 * size);
-  bm.eraseColor(c1);
-  bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
-  bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
-  return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode,
-                                    SkShader::kRepeat_TileMode);
-}
-
-static void DrawCheckerboard(SkCanvas* canvas,
-                             SkColor c1,
-                             SkColor c2,
-                             int size) {
-  SkPaint paint;
-  paint.setShader(CreateCheckerboardShader(c1, c2, size));
-  canvas->drawPaint(paint);
-}
-
-void DrawCheckerboard(SkCanvas* canvas, const SkRect& rect) {
-  // Draw a checkerboard
-  canvas->save();
-  canvas->clipRect(rect);
-  DrawCheckerboard(canvas, 0x4400FF00, 0x00000000, 12);
-  canvas->restore();
-
-  // Stroke the drawn area
-  SkPaint debugPaint;
-  debugPaint.setStrokeWidth(3);
-  debugPaint.setColor(SK_ColorRED);
-  debugPaint.setStyle(SkPaint::kStroke_Style);
-  canvas->drawRect(rect, debugPaint);
-}
-
-}  // namespace flow

flow/checkerboard.h

-// Copyright 2015 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.
-
-#ifndef FLOW_CHECKERBOARD_H_
-#define FLOW_CHECKERBOARD_H_
-
-#include "third_party/skia/include/core/SkCanvas.h"
-
-namespace flow {
-
-void DrawCheckerboard(SkCanvas* canvas, const SkRect& rect);
-
-}  // namespace flow
-
-#endif  // FLOW_CHECKERBOARD_H_

flow/layers/picture_layer.cc

@@ -4,15 +4,11 @@
 
 #include "flow/layers/picture_layer.h"
 
-#include "flow/checkerboard.h"
 #include "flow/raster_cache.h"
 #include "lib/ftl/logging.h"
 
 namespace flow {
 
-// TODO(abarth): Make this configurable by developers.
-const bool kDebugCheckerboardRasterizedLayers = false;
-
 PictureLayer::PictureLayer() {}
 
 PictureLayer::~PictureLayer() {}
@@ -32,8 +28,6 @@ void PictureLayer::Paint(PaintContext& context) {
     SkRect rect = picture_->cullRect().makeOffset(offset_.x(), offset_.y());
     context.canvas.drawImageRect(image_.get(), rect, nullptr,
                                  SkCanvas::kFast_SrcRectConstraint);
-    if (kDebugCheckerboardRasterizedLayers)
-      DrawCheckerboard(&context.canvas, rect);
   } else {
     TRACE_EVENT1("flutter", "PictureLayer::Paint", "image", "normal");
     SkAutoCanvasRestore save(&context.canvas, true);