Use KernelTypeGraphBuilder in KernelInferrerEngine

pkg/compiler/lib/src/kernel/element_map.dart

Index: pkg/compiler/lib/src/kernel/element_map.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map.dart b/pkg/compiler/lib/src/kernel/element_map.dart
index 1ae5ab6fd93e9234cb69bbb1513f3f843339f4e7..35ecc3930eb8243bd8482d97fb4b18e86eb408b7 100644
--- a/pkg/compiler/lib/src/kernel/element_map.dart
+++ b/pkg/compiler/lib/src/kernel/element_map.dart
@@ -215,7 +215,7 @@ enum MemberKind {
   // A constructor whose body is defined by an [ir.Constructor] node.
   constructorBody,
   // A closure class `call` method whose body is defined by an
-  // [ir.FunctionExpression].
+  // [ir.FunctionExpression] or [ir.FunctionDeclaration].
   closureCall,
   // A field corresponding to a captured variable in the closure. It does not
   // have a corresponding ir.Node.
@@ -391,6 +391,12 @@ abstract class KernelToLocalsMap {
   // parameter.
   Local getLocalVariable(ir.VariableDeclaration node);
 
+  /// Returns the [ir.FunctionNode] that declared [parameter].
+  ir.FunctionNode getFunctionNodeForParameter(Local parameter);
+
+  /// Returns the [ir.DartType] of [parameter].
+  ir.DartType getParameterType(Local parameter);
+
   /// Returns the [JumpTarget] for the break statement [node].
   JumpTarget getJumpTargetForBreak(ir.BreakStatement node);