Reverts "[display_list] allow applying opacity peephole to single glyph. (#53160)"

display_list/BUILD.gn

@@ -131,7 +131,6 @@ if (enable_unittests) {
       ":display_list",
       ":display_list_fixtures",
       "//flutter/display_list/testing:display_list_testing",
-      "//flutter/impeller/typographer/backends/skia:typographer_skia_backend",
       "//flutter/testing",
       "//flutter/testing:skia",
     ]

display_list/display_list_unittests.cc

@@ -22,7 +22,6 @@
 #include "flutter/testing/display_list_testing.h"
 #include "flutter/testing/testing.h"
 
-#include "impeller/typographer/backends/skia/text_frame_skia.h"
 #include "third_party/skia/include/core/SkBBHFactory.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
@@ -4332,30 +4331,5 @@ TEST_F(DisplayListTest, DrawDisplayListForwardsBackdropFlag) {
   EXPECT_TRUE(parent_dl->root_has_backdrop_filter());
 }
 
-TEST_F(DisplayListTest, TextFrameOpacityPeephole) {
-  // Single character can have opacity peephole applied.
-  {
-    std::string message = "A";
-    sk_sp<SkTextBlob> blob = CreateTextBlob(message);
-    auto frame = impeller::MakeTextFrameFromTextBlobSkia(blob);
-    DisplayListBuilder builder;
-    builder.DrawTextFrame(frame, 0, 0, {});
-    auto dl = builder.Build();
-    EXPECT_TRUE(dl->can_apply_group_opacity());
-  }
-
-  // Multiple characters cannot have opacity peephole applied.
-  {
-    std::string message = "ABC";
-    sk_sp<SkTextBlob> blob = CreateTextBlob(message);
-
-    auto frame = impeller::MakeTextFrameFromTextBlobSkia(blob);
-    DisplayListBuilder builder;
-    builder.DrawTextFrame(frame, 0, 0, {});
-    auto dl = builder.Build();
-    EXPECT_FALSE(dl->can_apply_group_opacity());
-  }
-}
-
 }  // namespace testing
 }  // namespace flutter

display_list/dl_builder.cc

@@ -1698,11 +1698,7 @@ void DisplayListBuilder::drawTextFrame(
     // they will protect overlapping glyphs from the effects of overdraw
     // so we must make the conservative assessment that this DL layer is
     // not compatible with group opacity inheritance.
-    // A single glyph can still have the opacity peephole applied (this is
-    // likely a glyph used as an Icon)
-    const bool is_single_glyph = text_frame->GetRunCount() == 1u &&
-                                 text_frame->GetRuns()[0].GetGlyphCount() == 1u;
-    UpdateLayerOpacityCompatibility(is_single_glyph);
+    UpdateLayerOpacityCompatibility(false);
     UpdateLayerResult(result);
   }
 }

display_list/testing/dl_test_snippets.cc

@@ -980,12 +980,5 @@ sk_sp<SkTextBlob> GetTestTextBlob(int index) {
   return blob;
 }
 
-sk_sp<SkTextBlob> CreateTextBlob(std::string& message) {
-  sk_sp<SkTextBlob> blob =
-      SkTextBlob::MakeFromText(message.c_str(), message.size(),
-                               CreateTestFontOfSize(20), SkTextEncoding::kUTF8);
-  return blob;
-}
-
 }  // namespace testing
 }  // namespace flutter

display_list/testing/dl_test_snippets.h

@@ -227,8 +227,6 @@ SkFont CreateTestFontOfSize(SkScalar scalar);
 
 sk_sp<SkTextBlob> GetTestTextBlob(int index);
 
-sk_sp<SkTextBlob> CreateTextBlob(std::string& message);
-
 struct DisplayListInvocation {
   // ----------------------------------
   // Required fields for initialization