remove obsolete DisplayListCanvasRecorder and its tests

ci/licenses_golden/licenses_flutter

@@ -715,8 +715,6 @@ ORIGIN: ../../../flutter/display_list/display_list_builder.h + ../../../flutter/
 ORIGIN: ../../../flutter/display_list/display_list_builder_benchmarks.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/display_list_canvas_dispatcher.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/display_list_canvas_dispatcher.h + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/display_list_canvas_recorder.cc + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/display_list/display_list_canvas_recorder.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/display_list_color.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/display_list_color_filter.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/display_list/display_list_color_filter.h + ../../../flutter/LICENSE
@@ -3216,8 +3214,6 @@ FILE: ../../../flutter/display_list/display_list_builder.h
 FILE: ../../../flutter/display_list/display_list_builder_benchmarks.cc
 FILE: ../../../flutter/display_list/display_list_canvas_dispatcher.cc
 FILE: ../../../flutter/display_list/display_list_canvas_dispatcher.h
-FILE: ../../../flutter/display_list/display_list_canvas_recorder.cc
-FILE: ../../../flutter/display_list/display_list_canvas_recorder.h
 FILE: ../../../flutter/display_list/display_list_color.h
 FILE: ../../../flutter/display_list/display_list_color_filter.cc
 FILE: ../../../flutter/display_list/display_list_color_filter.h

display_list/BUILD.gn

@@ -18,8 +18,6 @@ source_set("display_list") {
     "display_list_builder.h",
     "display_list_canvas_dispatcher.cc",
     "display_list_canvas_dispatcher.h",
-    "display_list_canvas_recorder.cc",
-    "display_list_canvas_recorder.h",
     "display_list_color.h",
     "display_list_color_filter.cc",
     "display_list_color_filter.h",

display_list/display_list.h

@@ -44,9 +44,9 @@
 // provides a nearly 1:1 translation between the records of the DisplayList
 // to method calls.
 //
-// A DisplayList can be created directly using a DisplayListBuilder and
-// the Dispatcher methods that it implements, or it can be created from
-// a sequence of SkCanvas calls using the DisplayListCanvasRecorder class.
+// A DisplayList must be created using a DisplayListBuilder using either its
+// stateful methods inherited from Dispatcher, or from its stateless methods
+// inherited from DlCanvas.
 //
 // A DisplayList can be read back by implementing the Dispatcher virtual
 // methods (with help from some of the classes in the utils file) and

display_list/display_list_builder.h

@@ -23,10 +23,8 @@
 namespace flutter {
 
 // The primary class used to build a display list. The list of methods
-// here matches the list of methods invoked on a |Dispatcher|.
-// If there is some code that already renders to an SkCanvas object,
-// those rendering commands can be captured into a DisplayList using
-// the DisplayListCanvasRecorder class.
+// here matches the list of methods invoked on a |Dispatcher| combined
+// with the list of methods invoked on a |DlCanvas|.
 class DisplayListBuilder final : public virtual DlCanvas,
                                  public SkRefCnt,
                                  virtual Dispatcher,