Increase Flutter framework minimum iOS version to 9.0 (#86840)

dev/devicelab/lib/tasks/plugin_tests.dart

@@ -172,14 +172,16 @@ class _FlutterProject {
         // it's not a regression in the IPHONEOS_DEPLOYMENT_TARGET override logic.
         // The plugintest target should not have IPHONEOS_DEPLOYMENT_TARGET set.
         // See _reduceDarwinPluginMinimumVersion for details.
-        if (target == 'ios' && 'IPHONEOS_DEPLOYMENT_TARGET'.allMatches(podsProjectContent).length != 6) {
-          throw TaskResult.failure('plugintest may contain IPHONEOS_DEPLOYMENT_TARGET');
+        final int iosDeploymentTargetCount = 'IPHONEOS_DEPLOYMENT_TARGET'.allMatches(podsProjectContent).length;
+        if (target == 'ios' && iosDeploymentTargetCount != 9) {
+          throw TaskResult.failure('plugintest may contain IPHONEOS_DEPLOYMENT_TARGET, $iosDeploymentTargetCount found');
         }
 
         // Same for macOS, but 12.
         // The plugintest target should not have MACOSX_DEPLOYMENT_TARGET set.
-        if (target == 'macos' && 'MACOSX_DEPLOYMENT_TARGET'.allMatches(podsProjectContent).length != 12) {
-          throw TaskResult.failure('plugintest may contain MACOSX_DEPLOYMENT_TARGET');
+        final int macosDeploymentTargetCount = 'MACOSX_DEPLOYMENT_TARGET'.allMatches(podsProjectContent).length;
+        if (target == 'macos' && macosDeploymentTargetCount != 12) {
+          throw TaskResult.failure('plugintest may contain MACOSX_DEPLOYMENT_TARGET, $macosDeploymentTargetCount found');
         }
       }
     });

packages/flutter_tools/bin/podhelper.rb

@@ -177,7 +177,7 @@ def flutter_install_ios_engine_pod(ios_application_path = nil)
         s.license          = { :type => 'MIT' }
         s.author           = { 'Flutter Dev Team' => 'flutter-dev@googlegroups.com' }
         s.source           = { :git => 'https://github.com/flutter/engine', :tag => s.version.to_s }
-        s.ios.deployment_target = '8.0'
+        s.ios.deployment_target = '9.0'
         # Framework linking is handled by Flutter tooling, not CocoaPods.
         # Add a placeholder to satisfy `s.dependency 'Flutter'` plugin podspecs.
         s.vendored_frameworks = 'path/to/nothing'

packages/flutter_tools/lib/src/commands/build_ios_framework.dart

@@ -286,7 +286,7 @@ LICENSE
   s.author                = { 'Flutter Dev Team' => 'flutter-dev@googlegroups.com' }
   s.source                = { :http => '${_cache.storageBaseUrl}/flutter_infra_release/flutter/${_cache.engineRevision}/$artifactsMode/artifacts.zip' }
   s.documentation_url     = 'https://flutter.dev/docs'
-  s.platform              = :ios, '8.0'
+  s.platform              = :ios, '9.0'
   s.vendored_frameworks   = 'Flutter.xcframework'
 end
 ''';

packages/flutter_tools/templates/module/ios/host_app_ephemeral/Flutter/engine/Flutter.podspec.tmpl

@@ -15,6 +15,6 @@ This pod vends the iOS Flutter engine framework. It is compatible with applicati
   s.author           = { 'Flutter Dev Team' => 'flutter-dev@googlegroups.com' }
   s.source           = { :git => 'https://github.com/flutter/engine', :tag => s.version.to_s }
   s.documentation_url     = 'https://flutter.dev/docs'
-  s.ios.deployment_target = '8.0'
+  s.ios.deployment_target = '9.0'
   s.vendored_frameworks = 'Flutter.xcframework'
 end