[fuchsia] Remove strict equality check for SkMatrix comparison for Fl… (#43421)

…… (#43309)

Flatland version of

https://github.com/flutter/engine/commit/a4775c7a7bc3dfa158ce83b62f8d89394ec65c15

Bug: fxb/126648

shell/platform/fuchsia/flutter/flatland_external_view_embedder.cc

diff --git a/shell/platform/fuchsia/flutter/flatland_external_view_embedder.cc b/shell/platform/fuchsia/flutter/flatland_external_view_embedder.cc
index 901bd8c..609d754 100644
--- a/shell/platform/fuchsia/flutter/flatland_external_view_embedder.cc
+++ b/shell/platform/fuchsia/flutter/flatland_external_view_embedder.cc
@@ -234,8 +234,26 @@
         const ViewMutators view_mutators =
             ParseMutatorStack(view_params.mutatorsStack());
         const SkSize view_size = view_params.sizePoints();
-        FML_CHECK(view_mutators.total_transform ==
-                  view_params.transformMatrix());
+
+        // Verify that we're unpacking the mutators' transform matrix correctly.
+        // Use built-in get method for SkMatrix to get values, see:
+        // https://source.corp.google.com/piper///depot/google3/third_party/skia/HEAD/include/core/SkMatrix.h;l=391
+        for (int index = 0; index < 9; index++) {
+          const SkScalar mutators_transform_value =
+              view_mutators.total_transform.get(index);
+          const SkScalar params_transform_value =
+              view_params.transformMatrix().get(index);
+          if (!SkScalarNearlyEqual(mutators_transform_value,
+                                   params_transform_value, 0.0005f)) {
+            FML_LOG(ERROR)
+                << "Assertion failed: view_mutators.total_transform[" << index
+                << "] (" << mutators_transform_value
+                << ") != view_params.transformMatrix()[" << index << "] ("
+                << params_transform_value
+                << "). This likely means there is a bug with the "
+                << "logic for parsing embedded views' transform matrices.";
+          }
+        }
 
         if (viewport.pending_create_viewport_callback) {
           if (view_size.fWidth && view_size.fHeight) {