Revert "[Impeller] DlAiksCanvas as a DlCanvas wrapper for impeller::Canvas" (flutter#45149)

Reverts flutter#45131

This is failing the Impeller variants of the unobstructed platform views tests:

https://ci.chromium.org/ui/p/flutter/builders/prod/Mac%20Production%20Engine%20Drone/132249/overview

```
Failing tests:
	-[UnobstructedPlatformViewTests testPlatformViewsMaxOverlays]
	-[UnobstructedPlatformViewTests testOneOverlay]
	-[UnobstructedPlatformViewTests testOneOverlayPartialIntersection]
	-[UnobstructedPlatformViewTests testTwoIntersectingOverlays]
	-[UnobstructedPlatformViewTests testOneOverlayAndTwoIntersectingOverlays]

** TEST FAILED **
```

We've retried it a few times so I suspect this isn't a flake.

Author: Jonah Williams

ci/licenses_golden/excluded_files

@@ -32,7 +32,6 @@
 ../../../flutter/display_list/benchmarking/dl_complexity_unittests.cc
 ../../../flutter/display_list/display_list_unittests.cc
 ../../../flutter/display_list/dl_color_unittests.cc
-../../../flutter/display_list/dl_op_spy_unittests.cc
 ../../../flutter/display_list/dl_paint_unittests.cc
 ../../../flutter/display_list/dl_vertices_unittests.cc
 ../../../flutter/display_list/effects/dl_color_filter_unittests.cc
@@ -55,7 +54,6 @@
 ../../../flutter/flow/frame_timings_recorder_unittests.cc
 ../../../flutter/flow/gl_context_switch_unittests.cc
 ../../../flutter/flow/instrumentation_unittests.cc
-../../../flutter/flow/layers/aiks_layer_unittests.cc
 ../../../flutter/flow/layers/backdrop_filter_layer_unittests.cc
 ../../../flutter/flow/layers/checkerboard_layertree_unittests.cc
 ../../../flutter/flow/layers/clip_path_layer_unittests.cc
@@ -221,6 +219,7 @@
 ../../../flutter/runtime/type_conversions_unittests.cc
 ../../../flutter/shell/common/animator_unittests.cc
 ../../../flutter/shell/common/context_options_unittests.cc
+../../../flutter/shell/common/dl_op_spy_unittests.cc
 ../../../flutter/shell/common/engine_unittests.cc
 ../../../flutter/shell/common/fixtures
 ../../../flutter/shell/common/input_events_unittests.cc

ci/licenses_golden/licenses_flutter

@@ -735,8 +735,6 @@ ORIGIN: ../../../flutter/display_list/dl_op_recorder.cc + ../../../flutter/LICEN
 ORIGIN: ../../../flutter/display_list/dl_op_recorder.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/dl_op_records.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/dl_op_records.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/dl_op_spy.cc + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/dl_op_spy.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/dl_paint.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/dl_paint.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/dl_sampling_options.h + ../../../flutter/LICENSE
@@ -793,8 +791,6 @@ ORIGIN: ../../../flutter/flow/instrumentation.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/instrumentation.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/layer_snapshot_store.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/layer_snapshot_store.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/flow/layers/aiks_layer.cc + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/flow/layers/aiks_layer.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/layers/backdrop_filter_layer.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/layers/backdrop_filter_layer.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/flow/layers/cacheable_layer.cc + ../../../flutter/LICENSE
@@ -1167,8 +1163,6 @@ ORIGIN: ../../../flutter/impeller/core/texture_descriptor.cc + ../../../flutter/
 ORIGIN: ../../../flutter/impeller/core/texture_descriptor.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/core/vertex_buffer.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/core/vertex_buffer.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/impeller/display_list/dl_aiks_canvas.cc + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/impeller/display_list/dl_aiks_canvas.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/dl_dispatcher.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/dl_dispatcher.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/display_list/dl_image_impeller.cc + ../../../flutter/LICENSE
@@ -2249,6 +2243,8 @@ ORIGIN: ../../../flutter/shell/common/display.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/display.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/display_manager.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/display_manager.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/shell/common/dl_op_spy.cc + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/shell/common/dl_op_spy.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/engine.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/engine.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/common/pipeline.cc + ../../../flutter/LICENSE
@@ -3485,8 +3481,6 @@ FILE: ../../../flutter/display_list/dl_op_recorder.cc
 FILE: ../../../flutter/display_list/dl_op_recorder.h
 FILE: ../../../flutter/display_list/dl_op_records.cc
 FILE: ../../../flutter/display_list/dl_op_records.h
-FILE: ../../../flutter/display_list/dl_op_spy.cc
-FILE: ../../../flutter/display_list/dl_op_spy.h
 FILE: ../../../flutter/display_list/dl_paint.cc
 FILE: ../../../flutter/display_list/dl_paint.h
 FILE: ../../../flutter/display_list/dl_sampling_options.h
@@ -3543,8 +3537,6 @@ FILE: ../../../flutter/flow/instrumentation.cc
 FILE: ../../../flutter/flow/instrumentation.h
 FILE: ../../../flutter/flow/layer_snapshot_store.cc
 FILE: ../../../flutter/flow/layer_snapshot_store.h
-FILE: ../../../flutter/flow/layers/aiks_layer.cc
-FILE: ../../../flutter/flow/layers/aiks_layer.h
 FILE: ../../../flutter/flow/layers/backdrop_filter_layer.cc
 FILE: ../../../flutter/flow/layers/backdrop_filter_layer.h
 FILE: ../../../flutter/flow/layers/cacheable_layer.cc
@@ -3917,8 +3909,6 @@ FILE: ../../../flutter/impeller/core/texture_descriptor.cc
 FILE: ../../../flutter/impeller/core/texture_descriptor.h
 FILE: ../../../flutter/impeller/core/vertex_buffer.cc
 FILE: ../../../flutter/impeller/core/vertex_buffer.h
-FILE: ../../../flutter/impeller/display_list/dl_aiks_canvas.cc
-FILE: ../../../flutter/impeller/display_list/dl_aiks_canvas.h
 FILE: ../../../flutter/impeller/display_list/dl_dispatcher.cc
 FILE: ../../../flutter/impeller/display_list/dl_dispatcher.h
 FILE: ../../../flutter/impeller/display_list/dl_image_impeller.cc
@@ -5004,6 +4994,8 @@ FILE: ../../../flutter/shell/common/display.cc
 FILE: ../../../flutter/shell/common/display.h
 FILE: ../../../flutter/shell/common/display_manager.cc
 FILE: ../../../flutter/shell/common/display_manager.h
+FILE: ../../../flutter/shell/common/dl_op_spy.cc
+FILE: ../../../flutter/shell/common/dl_op_spy.h
 FILE: ../../../flutter/shell/common/engine.cc
 FILE: ../../../flutter/shell/common/engine.h
 FILE: ../../../flutter/shell/common/pipeline.cc

display_list/BUILD.gn

@@ -43,8 +43,6 @@ source_set("display_list") {
     "dl_op_recorder.h",
     "dl_op_records.cc",
     "dl_op_records.h",
-    "dl_op_spy.cc",
-    "dl_op_spy.h",
     "dl_paint.cc",
     "dl_paint.h",
     "dl_sampling_options.h",
@@ -113,7 +111,6 @@ if (enable_unittests) {
       "benchmarking/dl_complexity_unittests.cc",
       "display_list_unittests.cc",
       "dl_color_unittests.cc",
-      "dl_op_spy_unittests.cc",
       "dl_paint_unittests.cc",
       "dl_vertices_unittests.cc",
       "effects/dl_color_filter_unittests.cc",

display_list/display_list.cc

@@ -33,7 +33,7 @@ DisplayList::DisplayList(DlStorage&& storage,
                          bool can_apply_group_opacity,
                          bool is_ui_thread_safe,
                          bool modifies_transparent_black,
-                         std::shared_ptr<const DlRTree> rtree)
+                         sk_sp<const DlRTree> rtree)
     : storage_(std::move(storage)),
       op_count_(op_count),
       nested_byte_count_(nested_byte_count),

display_list/display_list.h

@@ -234,7 +234,7 @@ class DisplayList : public SkRefCnt {
   const SkRect& bounds() const { return bounds_; }
 
   bool has_rtree() const { return rtree_ != nullptr; }
-  std::shared_ptr<const DlRTree> rtree() const { return rtree_; }
+  sk_sp<const DlRTree> rtree() const { return rtree_; }
 
   bool Equals(const DisplayList* other) const;
   bool Equals(const DisplayList& other) const { return Equals(&other); }
@@ -300,7 +300,7 @@ class DisplayList : public SkRefCnt {
               bool can_apply_group_opacity,
               bool is_ui_thread_safe,
               bool modifies_transparent_black,
-              std::shared_ptr<const DlRTree> rtree);
+              sk_sp<const DlRTree> rtree);
 
   static uint32_t next_unique_id();
 
@@ -317,7 +317,7 @@ class DisplayList : public SkRefCnt {
   const bool is_ui_thread_safe_;
   const bool modifies_transparent_black_;
 
-  const std::shared_ptr<const DlRTree> rtree_;
+  const sk_sp<const DlRTree> rtree_;
 
   void Dispatch(DlOpReceiver& ctx,
                 uint8_t* ptr,

display_list/display_list_unittests.cc

@@ -1932,7 +1932,7 @@ TEST_F(DisplayListTest, FlatDrawPointsProducesBounds) {
   }
 }
 
-static void test_rtree(const std::shared_ptr<const DlRTree>& rtree,
+static void test_rtree(const sk_sp<const DlRTree>& rtree,
                        const SkRect& query,
                        std::vector<SkRect> expected_rects,
                        const std::vector<int>& expected_indices) {

display_list/dl_canvas.h

@@ -18,10 +18,6 @@
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/core/SkTextBlob.h"
 
-namespace impeller {
-struct Picture;
-}  // namespace impeller
-
 namespace flutter {
 
 // The primary class used to express rendering operations in the
@@ -63,12 +59,7 @@ class DlCanvas {
                          const DlImageFilter* backdrop = nullptr) = 0;
   virtual void Restore() = 0;
   virtual int GetSaveCount() const = 0;
-  virtual void RestoreToCount(int restore_count) {
-    FML_DCHECK(restore_count <= GetSaveCount());
-    while (restore_count < GetSaveCount() && GetSaveCount() > 1) {
-      Restore();
-    }
-  }
+  virtual void RestoreToCount(int restore_count) = 0;
 
   virtual void Translate(SkScalar tx, SkScalar ty) = 0;
   virtual void Scale(SkScalar sx, SkScalar sy) = 0;
@@ -208,9 +199,6 @@ class DlCanvas {
                          const DlPaint* paint = nullptr) = 0;
   virtual void DrawDisplayList(const sk_sp<DisplayList> display_list,
                                SkScalar opacity = SK_Scalar1) = 0;
-  virtual void DrawImpellerPicture(
-      const std::shared_ptr<const impeller::Picture>& picture,
-      SkScalar opacity = SK_Scalar1) = 0;
   virtual void DrawTextBlob(const sk_sp<SkTextBlob>& blob,
                             SkScalar x,
                             SkScalar y,

display_list/dl_canvas_to_receiver.cc

@@ -811,12 +811,6 @@ void DlCanvasToReceiver::DrawDisplayList(const sk_sp<DisplayList> display_list,
           : OpResult::kPreservesTransparency,
       display_list->can_apply_group_opacity());
 }
-void DlCanvasToReceiver::DrawImpellerPicture(
-    const std::shared_ptr<const impeller::Picture>& picture,
-    SkScalar opacity) {
-  FML_LOG(ERROR) << "Cannot draw Impeller Picture in to a a display list.";
-  FML_DCHECK(false);
-}
 void DlCanvasToReceiver::DrawTextBlob(const sk_sp<SkTextBlob>& blob,
                                       SkScalar x,
                                       SkScalar y,

display_list/dl_canvas_to_receiver.h

@@ -10,10 +10,6 @@
 #include "flutter/display_list/dl_op_receiver.h"
 #include "flutter/fml/macros.h"
 
-namespace impeller {
-struct Picture;
-}
-
 namespace flutter {
 
 class DlCanvasReceiver : public DlOpReceiver {
@@ -341,10 +337,6 @@ class DlCanvasToReceiver : public virtual DlCanvas,  //
   void DrawDisplayList(const sk_sp<DisplayList> display_list,
                        SkScalar opacity = SK_Scalar1) override;
   // |DlCanvas|
-  void DrawImpellerPicture(
-      const std::shared_ptr<const impeller::Picture>& picture,
-      SkScalar opacity = SK_Scalar1) override;
-  // |DlCanvas|
   void DrawTextBlob(const sk_sp<SkTextBlob>& blob,
                     SkScalar x,
                     SkScalar y,

display_list/geometry/dl_rtree.h

@@ -25,7 +25,7 @@ namespace flutter {
 /// - Query for a set of non-overlapping rectangles that are joined
 ///   from the original rectangles that intersect a query rect
 ///   @see |searchAndConsolidateRects|
-class DlRTree {
+class DlRTree : public SkRefCnt {
  private:
   static constexpr int kMaxChildren = 11;