Clean up warnings.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index 1269993a8ea9198f8fb55944c242fb40eea71f9a..95a2b8fc7b0b37b1a373b3cf0c3084c8fef5bffe 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -1996,7 +1996,8 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
             wrapStatementGraph(elseGraph));
 
       conditionBlock.setBlockFlow(info, current);
-      conditionBlock.last.blockInformation = conditionBlock.blockFlow;
+      HIf ifBlock = conditionBlock.last;
+      ifBlock.blockInformation = conditionBlock.blockFlow;
 
       // If the body has any break, attach a synthesized label to the
       // if block.
@@ -3492,7 +3493,8 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
   visitNewExpression(NewExpression node) {
     Element element = elements[node.send];
     if (!Elements.isErroneousElement(element)) {
-      element = element.redirectionTarget;
+      FunctionElement function = element;
+      element = function.redirectionTarget;
     }
     if (Elements.isErroneousElement(element)) {
       ErroneousElement error = element;