Implement type inference of static invocations.

pkg/front_end/lib/src/fasta/kernel/kernel_shadow_ast.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// This file declares a "shadow hierarchy" of concrete classes which extend
 /// the kernel class hierarchy, adding methods and fields needed by the
 /// BodyBuilder.
 ///
 /// Instances of these classes may be created using the factory methods in
 /// `ast_factory.dart`.
@@ skipping 536 matching lines @@
       {bool isConst: false})
       : super(target, arguments, isConst: isConst);
 
   KernelStaticInvocation.byReference(
       Reference targetReference, Arguments arguments)
       : super.byReference(targetReference, arguments);
 
   @override
   DartType _inferExpression(
       KernelTypeInferrer inferrer, DartType typeContext, bool typeNeeded) {
-    // TODO(scheglov): implement.
-    return typeNeeded ? const DynamicType() : null;
+    return inferrer.inferStaticInvocation(
+        typeContext,
+        typeNeeded,
+        fileOffset,
+        target,
+        name,
+        _getExplicitTypeArguments(arguments),
+        _forEachArgument(arguments), (types) {
+      arguments.types.clear();
+      arguments.types.addAll(types);
+    });
   }
 }
 
 /// Shadow object for [StaticSet].
 class KernelStaticSet extends StaticSet implements KernelExpression {
   KernelStaticSet(Member target, Expression value) : super(target, value);
 
   KernelStaticSet.byReference(Reference targetReference, Expression value)
       : super.byReference(targetReference, value);
 
@@ skipping 421 matching lines @@
       : super(variable, value);
 
   @override
   DartType _inferExpression(
       KernelTypeInferrer inferrer, DartType typeContext, bool typeNeeded) {
     var variable = this.variable as KernelVariableDeclaration;
     return inferrer.inferVariableSet(
         typeContext, typeNeeded, variable._declaredType, value);
   }
 }