DO NOT LAND: But I'm really curious to see if anything blows up

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

@@ -105,6 +105,8 @@ @interface FlutterEngine () <FlutterIndirectScribbleDelegate,
 @property(nonatomic, readonly, assign) BOOL allowHeadlessExecution;
 @property(nonatomic, readonly, assign) BOOL restorationEnabled;
 
+@property(nonatomic, strong) FlutterPlatformViewsController* platformViewsController;
+
 // Maintains a dictionary of plugin names that have registered with the engine.  Used by
 // FlutterEngineRegistrar to implement a FlutterPluginRegistrar.
 @property(nonatomic, readonly) NSMutableDictionary* pluginPublications;
@@ -150,7 +152,6 @@ @implementation FlutterEngine {
   std::shared_ptr<flutter::ThreadHost> _threadHost;
   std::unique_ptr<flutter::Shell> _shell;
 
-  std::shared_ptr<flutter::PlatformViewsController> _platformViewsController;
   flutter::IOSRenderingAPI _renderingApi;
   std::shared_ptr<flutter::SamplingProfiler> _profiler;
 
@@ -264,7 +265,7 @@ - (void)setUpApplicationLifecycleNotifications:(NSNotificationCenter*)center {
 
 - (void)recreatePlatformViewController {
   _renderingApi = flutter::GetRenderingAPIForProcess(FlutterView.forceSoftwareRendering);
-  _platformViewsController.reset(new flutter::PlatformViewsController());
+  _platformViewsController = [[FlutterPlatformViewsController alloc] init];
 }
 
 - (flutter::IOSRenderingAPI)platformViewsRenderingAPI {
@@ -452,11 +453,7 @@ - (void)destroyContext {
   _shell.reset();
   _profiler.reset();
   _threadHost.reset();
-  _platformViewsController.reset();
-}
-
-- (std::shared_ptr<flutter::PlatformViewsController>&)platformViewsController {
-  return _platformViewsController;
+  _platformViewsController = nil;
 }
 
 - (NSURL*)observatoryUrl {
@@ -635,7 +632,7 @@ - (void)maybeSetupPlatformViewChannels {
     [self.platformViewsChannel
         setMethodCallHandler:^(FlutterMethodCall* call, FlutterResult result) {
           if (weakSelf) {
-            weakSelf.platformViewsController->OnMethodCall(call, result);
+            [weakSelf.platformViewsController onMethodCall:call result:result];
           }
         }];
 
@@ -778,10 +775,10 @@ - (BOOL)createShell:(NSString*)entrypoint
           return std::unique_ptr<flutter::PlatformViewIOS>();
         }
         [strongSelf recreatePlatformViewController];
-        strongSelf->_platformViewsController->SetTaskRunner(
-            shell.GetTaskRunners().GetPlatformTaskRunner());
+        strongSelf.platformViewsController.taskRunner =
+            shell.GetTaskRunners().GetPlatformTaskRunner();
         return std::make_unique<flutter::PlatformViewIOS>(
-            shell, strongSelf->_renderingApi, strongSelf->_platformViewsController,
+            shell, strongSelf->_renderingApi, strongSelf.platformViewsController,
             shell.GetTaskRunners(), shell.GetConcurrentWorkerTaskRunner(),
             shell.GetIsGpuDisabledSyncSwitch());
       };
@@ -1103,7 +1100,7 @@ - (void)flutterTextInputView:(FlutterTextInputView*)textInputView
   // Have to check in the next run loop, because iOS requests the previous first responder to
   // resign before requesting the next view to become first responder.
   dispatch_async(dispatch_get_main_queue(), ^(void) {
-    long platform_view_id = self.platformViewsController->FindFirstResponderPlatformViewId();
+    long platform_view_id = self.platformViewsController.firstResponderPlatformViewId;
     if (platform_view_id == -1) {
       return;
     }
@@ -1401,10 +1398,9 @@ - (FlutterEngine*)spawnWithEntrypoint:(/*nullable*/ NSString*)entrypoint
   flutter::Shell::CreateCallback<flutter::PlatformView> on_create_platform_view =
       [result, context](flutter::Shell& shell) {
         [result recreatePlatformViewController];
-        result->_platformViewsController->SetTaskRunner(
-            shell.GetTaskRunners().GetPlatformTaskRunner());
+        result.platformViewsController.taskRunner = shell.GetTaskRunners().GetPlatformTaskRunner();
         return std::make_unique<flutter::PlatformViewIOS>(
-            shell, context, result->_platformViewsController, shell.GetTaskRunners());
+            shell, context, result.platformViewsController, shell.GetTaskRunners());
       };
 
   flutter::Shell::CreateCallback<flutter::Rasterizer> on_create_rasterizer =
@@ -1499,8 +1495,9 @@ - (void)registerViewFactory:(NSObject<FlutterPlatformViewFactory>*)factory
                               withId:(NSString*)factoryId
     gestureRecognizersBlockingPolicy:
         (FlutterPlatformViewGestureRecognizersBlockingPolicy)gestureRecognizersBlockingPolicy {
-  [_flutterEngine platformViewsController]->RegisterViewFactory(factory, factoryId,
-                                                                gestureRecognizersBlockingPolicy);
+  [_flutterEngine.platformViewsController registerViewFactory:factory
+                                                       withId:factoryId
+                             gestureRecognizersBlockingPolicy:gestureRecognizersBlockingPolicy];
 }
 
 @end

shell/platform/darwin/ios/framework/Source/FlutterEngine_Internal.h

@@ -46,7 +46,6 @@ NS_ASSUME_NONNULL_BEGIN
                                  base64Encode:(bool)base64Encode;
 
 - (FlutterPlatformPlugin*)platformPlugin;
-- (std::shared_ptr<flutter::PlatformViewsController>&)platformViewsController;
 - (FlutterTextInputPlugin*)textInputPlugin;
 - (FlutterRestorationPlugin*)restorationPlugin;
 - (void)launchEngine:(nullable NSString*)entrypoint
@@ -81,6 +80,7 @@ NS_ASSUME_NONNULL_BEGIN
             userData:(nullable void*)userData;
 
 @property(nonatomic, readonly) FlutterDartProject* project;
+
 @end
 
 NS_ASSUME_NONNULL_END