Revert "Update third_party/pkg/kernel version"

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

Index: pkg/compiler/lib/src/kernel/kernel_visitor.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_visitor.dart b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
index d4d621637b0bb8f96f5c272fc51b2d54c4228b9b..2372496267ed4ec32adea2993593b668a54fa749 100644
--- a/pkg/compiler/lib/src/kernel/kernel_visitor.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
@@ -710,8 +710,7 @@ class KernelVisitor extends Object
     return new ir.ConditionalExpression(
         visitForValue(node.condition),
         visitWithCurrentContext(node.thenExpression),
-        visitWithCurrentContext(node.elseExpression),
-        null);
+        visitWithCurrentContext(node.elseExpression));
   }
 
   @override
@@ -1313,7 +1312,7 @@ class KernelVisitor extends Object
     Accessor accessor = (receiver == null)
         ? new ThisPropertyAccessor(irName, null, null)
         : PropertyAccessor.make(visitForValue(receiver), irName, null, null);
-    return accessor.buildNullAwareAssignment(visitForValue(rhs), null,
+    return accessor.buildNullAwareAssignment(visitForValue(rhs),
         voidContext: isVoidContext);
   }
 
@@ -1505,7 +1504,7 @@ class KernelVisitor extends Object
 
   Accessor buildNullAwarePropertyAccessor(Node receiver, Name name) {
     return new NullAwarePropertyAccessor(
-        visitForValue(receiver), nameToIrName(name), null, null, null);
+        visitForValue(receiver), nameToIrName(name), null, null);
   }
 
   @override
@@ -1525,8 +1524,7 @@ class KernelVisitor extends Object
             buildIsNull(new ir.VariableGet(receiver)),
             new ir.NullLiteral(),
             buildInvokeSelector(new ir.VariableGet(receiver), selector,
-                buildArguments(arguments)),
-            null));
+                buildArguments(arguments))));
   }
 
   @override
@@ -1540,7 +1538,7 @@ class KernelVisitor extends Object
   ir.Expression visitIfNotNullDynamicPropertySetIfNull(
       Send node, Node receiver, Name name, Node rhs, _) {
     return buildNullAwarePropertyAccessor(receiver, name)
-        .buildNullAwareAssignment(visitForValue(rhs), null,
+        .buildNullAwareAssignment(visitForValue(rhs),
             voidContext: isVoidContext);
   }
 
@@ -1551,12 +1549,8 @@ class KernelVisitor extends Object
   }
 
   @override
-  ir.Expression visitIfNull(Send node, Node left, Node right, _) {
-    var leftValue = new ir.VariableDeclaration.forValue(visitForValue(left));
-    return new ir.Let(
-        leftValue,
-        new ir.ConditionalExpression(buildIsNull(new ir.VariableGet(leftValue)),
-            visitForValue(right), new ir.VariableGet(leftValue), null));
+  ir.LogicalExpression visitIfNull(Send node, Node left, Node right, _) {
+    return buildLogicalExpression(left, node.selector, right);
   }
 
   @override
@@ -1843,7 +1837,7 @@ class KernelVisitor extends Object
       SendSet node, LocalElement local, Node rhs, _,
       {bool isSetterValid}) {
     return new VariableAccessor(getLocal(local)).buildNullAwareAssignment(
-        visitForValue(rhs), null,
+        visitForValue(rhs),
         voidContext: isVoidContext);
   }
 
@@ -1960,7 +1954,7 @@ class KernelVisitor extends Object
       setter = null;
     }
     return buildStaticAccessor(getter, setter).buildNullAwareAssignment(
-        visitForValue(rhs), null,
+        visitForValue(rhs),
         voidContext: isVoidContext);
   }
 
@@ -1997,7 +1991,6 @@ class KernelVisitor extends Object
           positionalParameters.add(variable);
         }
       });
-      namedParameters.sort();
       signature.forEachParameter((ParameterElement parameter) {
         if (!parameter.isOptional) return;
         ir.Expression initializer = visitForValue(parameter.initializer);
@@ -2402,7 +2395,7 @@ class KernelVisitor extends Object
       setter = null;
     }
     return buildSuperPropertyAccessor(getter, setter).buildNullAwareAssignment(
-        visitForValue(rhs), null,
+        visitForValue(rhs),
         voidContext: isVoidContext);
   }
 
@@ -2631,7 +2624,7 @@ class KernelVisitor extends Object
   ir.Expression visitTypeVariableTypeLiteralSetIfNull(
       Send node, TypeVariableElement element, Node rhs, _) {
     return new ReadOnlyAccessor(buildTypeVariable(element))
-        .buildNullAwareAssignment(visitForValue(rhs), null,
+        .buildNullAwareAssignment(visitForValue(rhs),
             voidContext: isVoidContext);
   }
 
@@ -2697,7 +2690,7 @@ class KernelVisitor extends Object
   ir.Expression visitIndexSetIfNull(
       SendSet node, Node receiver, Node index, Node rhs, _) {
     return buildIndexAccessor(receiver, index).buildNullAwareAssignment(
-        visitForValue(rhs), null,
+        visitForValue(rhs),
         voidContext: isVoidContext);
   }
 
@@ -2705,7 +2698,7 @@ class KernelVisitor extends Object
   ir.Expression visitSuperIndexSetIfNull(SendSet node, MethodElement getter,
       MethodElement setter, Node index, Node rhs, _) {
     return buildSuperIndexAccessor(index, getter, setter)
-        .buildNullAwareAssignment(visitForValue(rhs), null,
+        .buildNullAwareAssignment(visitForValue(rhs),
             voidContext: isVoidContext);
   }