Revert of Revert of Implement DisplayList GatherPixelRefs

cc/test/fake_display_list_recording_source.h

Index: cc/test/fake_display_list_recording_source.h
diff --git a/cc/test/fake_display_list_recording_source.h b/cc/test/fake_display_list_recording_source.h
new file mode 100644
index 0000000000000000000000000000000000000000..b9a15f327884e455d3fd7f876b283378a501360a
--- /dev/null
+++ b/cc/test/fake_display_list_recording_source.h
@@ -0,0 +1,88 @@
+// 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 CC_TEST_FAKE_DISPLAY_LIST_RECORDING_SOURCE_H_
+#define CC_TEST_FAKE_DISPLAY_LIST_RECORDING_SOURCE_H_
+
+#include "cc/resources/display_list_recording_source.h"
+#include "cc/test/fake_content_layer_client.h"
+#include "cc/test/impl_side_painting_settings.h"
+
+namespace cc {
+
+// This class provides method for test to add bitmap and draw rect to content
+// layer client. This class also provides function to rerecord to generate a new
+// display list.
+class FakeDisplayListRecordingSource : public DisplayListRecordingSource {
+ public:
+  explicit FakeDisplayListRecordingSource(const gfx::Size& grid_cell_size)
+      : DisplayListRecordingSource(grid_cell_size) {}
+  ~FakeDisplayListRecordingSource() override {}
+
+  static scoped_ptr<FakeDisplayListRecordingSource> CreateRecordingSource(
+      const gfx::Rect& recorded_viewport) {
+    scoped_ptr<FakeDisplayListRecordingSource> recording_source(
+        new FakeDisplayListRecordingSource(
+            ImplSidePaintingSettings().default_tile_grid_size));
+    recording_source->SetRecordedViewport(recorded_viewport);
+    return recording_source;
+  }
+
+  void SetRecordedViewport(const gfx::Rect& recorded_viewport) {
+    recorded_viewport_ = recorded_viewport;
+  }
+
+  void SetGridCellSize(const gfx::Size& grid_cell_size) {
+    grid_cell_size_ = grid_cell_size;
+  }
+
+  void Rerecord() {
+    ContentLayerClient::PaintingControlSetting painting_control =
+        ContentLayerClient::PAINTING_BEHAVIOR_NORMAL;
+    display_list_ = client_.PaintContentsToDisplayList(recorded_viewport_,
+                                                       painting_control);
+    display_list_->set_layer_rect(recorded_viewport_);
+    display_list_->CreateAndCacheSkPicture();
+    display_list_->GatherPixelRefs(grid_cell_size_);
+  }
+
+  void add_draw_rect(const gfx::RectF& rect) {
+    client_.add_draw_rect(rect, default_paint_);
+  }
+
+  void add_draw_rect_with_paint(const gfx::RectF& rect, const SkPaint& paint) {
+    client_.add_draw_rect(rect, paint);
+  }
+
+  void add_draw_bitmap(const SkBitmap& bitmap, const gfx::Point& point) {
+    client_.add_draw_bitmap(bitmap, point, default_paint_);
+  }
+
+  void add_draw_bitmap_with_transform(const SkBitmap& bitmap,
+                                      const gfx::Transform& transform) {
+    client_.add_draw_bitmap_with_transform(bitmap, transform, default_paint_);
+  }
+
+  void add_draw_bitmap_with_paint(const SkBitmap& bitmap,
+                                  const gfx::Point& point,
+                                  const SkPaint& paint) {
+    client_.add_draw_bitmap(bitmap, point, paint);
+  }
+
+  void add_draw_bitmap_with_paint_and_transform(const SkBitmap& bitmap,
+                                                const gfx::Transform& transform,
+                                                const SkPaint& paint) {
+    client_.add_draw_bitmap_with_transform(bitmap, transform, paint);
+  }
+
+  void set_default_paint(const SkPaint& paint) { default_paint_ = paint; }
+
+ private:
+  FakeContentLayerClient client_;
+  SkPaint default_paint_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_DISPLAY_LIST_RECORDING_SOURCE_H_