[flutter_tool] Remove extra usage of .packages in vm service API (#52845)

packages/flutter_tools/lib/src/resident_runner.dart

@@ -288,13 +288,11 @@ class FlutterDevice {
     bool pause = false,
   }) {
     final Uri deviceEntryUri = devFS.baseUri.resolveUri(globals.fs.path.toUri(entryPath));
-    final Uri devicePackagesUri = devFS.baseUri.resolve('.packages');
     return <Future<Map<String, dynamic>>>[
       for (final Isolate isolate in vmService.vm.isolates)
         isolate.reloadSources(
           pause: pause,
           rootLibUri: deviceEntryUri,
-          packagesUri: devicePackagesUri,
         ),
     ];
   }

packages/flutter_tools/lib/src/run_hot.dart

@@ -460,7 +460,7 @@ class HotRunner extends ResidentRunner {
   ) {
     return Future.wait(<Future<void>>[
       for (final FlutterView view in device.views)
-        view.runFromSource(entryUri, packagesUri, assetsDirectoryUri),
+        view.runFromSource(entryUri, assetsDirectoryUri),
     ]);
   }
 

packages/flutter_tools/lib/src/vmservice.dart

@@ -1040,14 +1040,12 @@ class VM extends ServiceObjectOwner {
   Future<ServiceMap> runInView(
     String viewId,
     Uri main,
-    Uri packages,
     Uri assetsDirectory,
   ) {
     return invokeRpc<ServiceMap>('_flutter.runInView',
       params: <String, dynamic>{
         'viewId': viewId,
         'mainScript': main.toString(),
-        'packagesFile': packages.toString(),
         'assetDirectory': assetsDirectory.toString(),
     });
   }
@@ -1256,7 +1254,6 @@ class Isolate extends ServiceObjectOwner {
   Future<Map<String, dynamic>> reloadSources({
     bool pause = false,
     Uri rootLibUri,
-    Uri packagesUri,
   }) async {
     try {
       final Map<String, dynamic> arguments = <String, dynamic>{
@@ -1265,9 +1262,6 @@ class Isolate extends ServiceObjectOwner {
       if (rootLibUri != null) {
         arguments['rootLibUri'] = rootLibUri.toString();
       }
-      if (packagesUri != null) {
-        arguments['packagesUri'] = packagesUri.toString();
-      }
       final Map<String, dynamic> response = await invokeRpcRaw('_reloadSources', params: arguments);
       return response;
     } on rpc.RpcException catch (e) {
@@ -1492,7 +1486,6 @@ class FlutterView extends ServiceObject {
   // TODO(johnmccutchan): Report errors when running failed.
   Future<void> runFromSource(
     Uri entryUri,
-    Uri packagesUri,
     Uri assetsDirectoryUri,
   ) async {
     final String viewId = id;
@@ -1511,7 +1504,6 @@ class FlutterView extends ServiceObject {
       });
     await owner.vm.runInView(viewId,
                              entryUri,
-                             packagesUri,
                              assetsDirectoryUri);
     await completer.future;
     await owner.vm.refreshViews(waitForViews: true);

packages/flutter_tools/test/general.shard/resident_runner_test.dart

@@ -96,7 +96,7 @@ void main() {
     final MockVM mockVM = MockVM();
     when(mockVMService.vm).thenReturn(mockVM);
     when(mockVM.isolates).thenReturn(<Isolate>[mockIsolate]);
-    when(mockFlutterView.runFromSource(any, any, any)).thenAnswer((Invocation invocation) async {});
+    when(mockFlutterView.runFromSource(any, any)).thenAnswer((Invocation invocation) async {});
     when(mockFlutterDevice.stopEchoingDeviceLog()).thenAnswer((Invocation invocation) async { });
     when(mockFlutterDevice.observatoryUris).thenAnswer((_) => Stream<Uri>.value(testUri));
     when(mockFlutterDevice.connect(