Migrate UnlinkedParam.defaultValue to UnlinkedExecutable.bodyExpr.

pkg/analyzer/lib/src/summary/idl.dart

Index: pkg/analyzer/lib/src/summary/idl.dart
diff --git a/pkg/analyzer/lib/src/summary/idl.dart b/pkg/analyzer/lib/src/summary/idl.dart
index de2ef5704bd44bdbbf32c6937de0760dc6dfe8d3..41c79051e5cdaf5a959b9f23cb6f2187069c11ad 100644
--- a/pkg/analyzer/lib/src/summary/idl.dart
+++ b/pkg/analyzer/lib/src/summary/idl.dart
@@ -2149,16 +2149,8 @@ abstract class UnlinkedParam extends base.SummaryClass {
    * Code range of the parameter.
    */
   @informative
-  @Id(14)
-  CodeRange get codeRange;
-
-  /**
-   * If the parameter has a default value, the constant expression in the
-   * default value.  Note that the presence of this expression does not mean
-   * that it is a valid, check [UnlinkedConst.isInvalid].
-   */
   @Id(7)
-  UnlinkedConst get defaultValue;
+  CodeRange get codeRange;
 
   /**
    * If the parameter has a default value, the source text of the constant