[pkg/vm] Bump language version to 3.0 and cleanup experimental flags

Minimum SDK version is increased in order to be able to use Dart 3.0
language features in pkg/vm.

TEST=ci

Change-Id: I4ef1139b2f8ba8acc7dbcf9bc0fe77f663cc427d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/325541
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>

pkg/vm/lib/transformations/type_flow/analysis.dart

@@ -79,7 +79,7 @@ class _DependencyTracker {
 /// This is the basic unit of processing in type flow analysis.
 /// Call sites calling the same method with the same argument types
 /// may reuse results of the analysis through the same _Invocation instance.
-abstract class _Invocation extends _DependencyTracker
+abstract base class _Invocation extends _DependencyTracker
     with LinkedListEntry<_Invocation> {
   final Selector selector;
   final Args<Type> args;
@@ -187,7 +187,7 @@ abstract class _Invocation extends _DependencyTracker
   }
 }
 
-class _DirectInvocation extends _Invocation {
+final class _DirectInvocation extends _Invocation {
   _DirectInvocation(DirectSelector selector, Args<Type> args)
       : super(selector, args);
 
@@ -367,7 +367,7 @@ class _DirectInvocation extends _Invocation {
   }
 }
 
-class _DispatchableInvocation extends _Invocation {
+final class _DispatchableInvocation extends _Invocation {
   bool _isPolymorphic = false;
   Set<Call>? _callSites; // Populated only if not polymorphic.
   Member? _monomorphicTarget;

pkg/vm/pubspec.yaml

@@ -4,7 +4,7 @@ description: VM specific Dart code and helper scripts
 publish_to: none
 
 environment:
-  sdk: '>=2.17.0 <4.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 # Use 'any' constraints here; we get our versions from the DEPS file.
 dependencies:

pkg/vm/testcases/transformations/type_flow/transformer/records_dart2wasm.dart.options

@@ -1,2 +1 @@
---enable-experiment=records
 --target=dart2wasm

pkg/vm/testcases/transformations/unreachable_code_elimination/uce_testcases.dart.expect

@@ -68,13 +68,15 @@ static method testRemovalOfStatementBodies() → dynamic {
   on core::Object catch(final core::Object e) {
   }
   {}
+  #L1:
   switch(42) /* core::int */ {
-    #L1:
+    #L2:
     case #C3:
       {}
   }
+  #L3:
   switch(42) /* core::int */ {
-    #L2:
+    #L4:
     default:
       {}
   }

pkg/vm/tool/compare_il

@@ -28,4 +28,4 @@ SDK_DIR="$CUR_DIR/../../.."
 # checked-in dart binaries must be adjusted.
 DART="$SDK_DIR/tools/sdks/dart-sdk/bin/dart"
 
-exec "$DART" $DART_VM_FLAGS --enable-experiment=records,patterns "${SDK_DIR}/pkg/vm/bin/compare_il.dart" $@
+exec "$DART" $DART_VM_FLAGS "${SDK_DIR}/pkg/vm/bin/compare_il.dart" $@

pkg/vm/tool/compare_il.bat

@@ -14,4 +14,4 @@ set SDK_DIR=%SCRIPTPATH%/../../../
 
 set DART=%SDK_DIR%/tools/sdks/dart-sdk/bin/dart.exe
 
-"%DART%" %DART_VM_OPTIONS% --enable-experiment=records,patterns "%SDK_DIR%/pkg/vm/bin/compare_il.dart" %*
+"%DART%" %DART_VM_OPTIONS% "%SDK_DIR%/pkg/vm/bin/compare_il.dart" %*