Guard browser OPFS custom session readback helper

wasm-port/tests/browser/interp_smoke.html

@@ -9560,9 +9560,9 @@
           "5399\t199.000000",
         ],
       );
-      await verifyOpfsSavedText(
+      await verifyOpfsReadback(
         "opfs_saved_ini_named_parameter_backup_text",
-        () => loadTextFile(savedIniNamedParameters.backupOpfsPath),
+        savedIniNamedParameters.backupOpfsPath,
         [
           "5161 31.25",
           "5162 62.5",
@@ -9606,9 +9606,9 @@
           "tool_1.pocketno=8",
         ],
       );
-      await verifyOpfsSavedText(
+      await verifyOpfsReadback(
         "opfs_saved_ini_named_tool_table_text",
-        () => loadTextFile(loadedIniFileSession.toolTable.opfsPath),
+        loadedIniFileSession.toolTable.opfsPath,
         [
           "T8",
           "P8",
@@ -9740,9 +9740,9 @@
           "parameter_5399=202",
         ],
       );
-      await verifyOpfsSavedText(
+      await verifyOpfsReadback(
         "opfs_saved_explicit_parameter_text",
-        () => loadTextFile(loadedIniOverrideSession.parameters.opfsPath),
+        loadedIniOverrideSession.parameters.opfsPath,
         [
           "5161\t51.250000",
           "5162\t102.500000",
@@ -9750,9 +9750,9 @@
           "5399\t202.000000",
         ],
       );
-      await verifyOpfsSavedText(
+      await verifyOpfsReadback(
         "opfs_saved_explicit_parameter_backup_text",
-        () => loadTextFile(savedExplicitParameters.backupOpfsPath),
+        savedExplicitParameters.backupOpfsPath,
         [
           "5161 41.25",
           "5162 82.5",
@@ -9784,9 +9784,9 @@
           "tool_1.pocketno=9",
         ],
       );
-      await verifyOpfsSavedText(
+      await verifyOpfsReadback(
         "opfs_saved_explicit_tool_table_text",
-        () => loadTextFile(loadedIniOverrideSession.toolTable.opfsPath),
+        loadedIniOverrideSession.toolTable.opfsPath,
         [
           "T9",
           "P9",