Use the SkParagraph text renderer by default (flutter#28912)

Author: jason-simmons

shell/common/switches.cc

@@ -411,8 +411,9 @@ Settings SettingsFromCommandLine(const fml::CommandLine& command_line) {
   settings.use_test_fonts =
       command_line.HasOption(FlagForSwitch(Switch::UseTestFonts));
 
-  settings.enable_skparagraph =
-      command_line.HasOption(FlagForSwitch(Switch::EnableSkParagraph));
+  std::string enable_skparagraph = command_line.GetOptionValueWithDefault(
+      FlagForSwitch(Switch::EnableSkParagraph), "");
+  settings.enable_skparagraph = enable_skparagraph != "false";
 
   settings.prefetched_default_font_manager = command_line.HasOption(
       FlagForSwitch(Switch::PrefetchedDefaultFontManager));

shell/platform/android/io/flutter/embedding/engine/loader/FlutterLoader.java

@@ -308,7 +308,8 @@ public void ensureInitializationComplete(
 
       shellArgs.add("--prefetched-default-font-manager");
 
-      if (metaData != null && metaData.getBoolean(ENABLE_SKPARAGRAPH_META_DATA_KEY)) {
+      if (metaData == null || metaData.getBoolean(ENABLE_SKPARAGRAPH_META_DATA_KEY, true)) {
+
         shellArgs.add("--enable-skparagraph");
       }
 

shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm

@@ -158,7 +158,7 @@
 
   // SkParagraph text layout library
   NSNumber* enableSkParagraph = [mainBundle objectForInfoDictionaryKey:@"FLTEnableSkParagraph"];
-  settings.enable_skparagraph = (enableSkParagraph != nil) ? enableSkParagraph.boolValue : false;
+  settings.enable_skparagraph = (enableSkParagraph != nil) ? enableSkParagraph.boolValue : true;
 
   // Leak Dart VM settings, set whether leave or clean up the VM after the last shell shuts down.
   NSNumber* leakDartVM = [mainBundle objectForInfoDictionaryKey:@"FLTLeakDartVM"];