Revert "Use a single OffscreenCanvas for rendering in CanvasKit (#42672)"

This reverts commit c5ba843.

Author: bdero

ci/licenses_golden/licenses_flutter

@@ -1970,11 +1970,10 @@ ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/picture_recorder.da
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/platform_message.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/raster_cache.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/rasterizer.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/render_canvas.dart + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/render_canvas_factory.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/renderer.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/shader.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/surface.dart + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/surface_factory.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/text.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/text_fragmenter.dart + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/util.dart + ../../../flutter/LICENSE
@@ -4720,11 +4719,10 @@ FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/picture_recorder.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/platform_message.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/raster_cache.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/rasterizer.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/render_canvas.dart
-FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/render_canvas_factory.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/renderer.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/shader.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/surface.dart
+FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/surface_factory.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/text.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/text_fragmenter.dart
 FILE: ../../../flutter/lib/web_ui/lib/src/engine/canvaskit/util.dart

lib/web_ui/lib/src/engine.dart

@@ -43,11 +43,10 @@ export 'engine/canvaskit/picture.dart';
 export 'engine/canvaskit/picture_recorder.dart';
 export 'engine/canvaskit/raster_cache.dart';
 export 'engine/canvaskit/rasterizer.dart';
-export 'engine/canvaskit/render_canvas.dart';
-export 'engine/canvaskit/render_canvas_factory.dart';
 export 'engine/canvaskit/renderer.dart';
 export 'engine/canvaskit/shader.dart';
 export 'engine/canvaskit/surface.dart';
+export 'engine/canvaskit/surface_factory.dart';
 export 'engine/canvaskit/text.dart';
 export 'engine/canvaskit/text_fragmenter.dart';
 export 'engine/canvaskit/util.dart';

lib/web_ui/lib/src/engine/canvaskit/canvaskit_api.dart

@@ -161,13 +161,6 @@ extension CanvasKitExtension on CanvasKit {
       DomCanvasElement canvas, SkWebGLContextOptions options) =>
         _GetWebGLContext(canvas, options).toDartDouble;
 
-  @JS('GetWebGLContext')
-  external JSNumber _GetOffscreenWebGLContext(
-      DomOffscreenCanvas canvas, SkWebGLContextOptions options);
-  double GetOffscreenWebGLContext(
-          DomOffscreenCanvas canvas, SkWebGLContextOptions options) =>
-      _GetOffscreenWebGLContext(canvas, options).toDartDouble;
-
   @JS('MakeGrContext')
   external SkGrContext _MakeGrContext(JSNumber glContext);
   SkGrContext MakeGrContext(double glContext) =>
@@ -206,9 +199,6 @@ extension CanvasKitExtension on CanvasKit {
 
   external SkSurface MakeSWCanvasSurface(DomCanvasElement canvas);
 
-  @JS('MakeSWCanvasSurface')
-  external SkSurface MakeOffscreenSWCanvasSurface(DomOffscreenCanvas canvas);
-
   /// Creates an image from decoded pixels represented as a list of bytes.
   ///
   /// The pixel data must be encoded according to the image info in [info].