tweak FunctionTypeImpl to support generic methods

pkg/analyzer/lib/src/task/dart.dart

Index: pkg/analyzer/lib/src/task/dart.dart
diff --git a/pkg/analyzer/lib/src/task/dart.dart b/pkg/analyzer/lib/src/task/dart.dart
index b358fd36c08e77bc0d674ac7f445fcd93a4331c1..2aae1a1f3dcb828444726b8985bd423ea4a1dbc9 100644
--- a/pkg/analyzer/lib/src/task/dart.dart
+++ b/pkg/analyzer/lib/src/task/dart.dart
@@ -3259,6 +3259,7 @@ class ParseDartTask extends SourceBasedAnalysisTask {
     AnalysisOptions options = context.analysisOptions;
     parser.parseFunctionBodies = options.analyzeFunctionBodiesPredicate(source);
     parser.parseGenericMethods = options.enableGenericMethods;
+    parser.parseGenericMethodComments = options.strongMode;
     CompilationUnit unit = parser.parseCompilationUnit(tokenStream);
     unit.lineInfo = lineInfo;
 
@@ -4437,6 +4438,7 @@ class ScanDartTask extends SourceBasedAnalysisTask {
           errorListener);
       scanner.setSourceStart(fragment.line, fragment.column);
       scanner.preserveComments = context.analysisOptions.preserveComments;
+      scanner.scanGenericMethodComments = context.analysisOptions.strongMode;
 
       outputs[TOKEN_STREAM] = scanner.tokenize();
       outputs[LINE_INFO] = new LineInfo(scanner.lineStarts);
@@ -4447,6 +4449,7 @@ class ScanDartTask extends SourceBasedAnalysisTask {
       Scanner scanner =
           new Scanner(source, new CharSequenceReader(content), errorListener);
       scanner.preserveComments = context.analysisOptions.preserveComments;
+      scanner.scanGenericMethodComments = context.analysisOptions.strongMode;
 
       outputs[TOKEN_STREAM] = scanner.tokenize();
       outputs[LINE_INFO] = new LineInfo(scanner.lineStarts);