Set 'isSyntheticDefault' for default constructors.

pkg/front_end/testcases/DeltaBlue.dart.outline.expect

 library;
 import self as self;
 import "dart:core" as core;
 
 class DeltaBlue extends core::Object {
-  constructor •() → void
+  default constructor •() → void

[Johnni Winther, 2017/07/14 09:22:02]

Why isn't this change also in the .direct.expect file?

[ahe, 2017/07/14 09:42:26]

It's probably because it already fails today, this is from compile.status:

DeltaBlue: Fail # Missing types on constructor parameters.

The direct.expect file is from dartk, and I need to go through them manually at
some point to ensure that there are no regressions.

     ;
   method run() → void
     ;
 }
 class Strength extends core::Object {
   final field core::int value;
   final field core::String name;
   const constructor •(core::int value, core::String name) → void
     ;
   method nextWeaker() → self::Strength
@@ skipping 127 matching lines @@
   final field core::String name;
   constructor •(core::String name, core::int value) → void
     ;
   method addConstraint(self::Constraint c) → void
     ;
   method removeConstraint(self::Constraint c) → void
     ;
 }
 class Planner extends core::Object {
   field core::int currentMark;
-  constructor •() → void
+  default constructor •() → void
     ;
   method incrementalAdd(self::Constraint c) → void
     ;
   method incrementalRemove(self::Constraint c) → void
     ;
   method newMark() → core::int
     ;
   method makePlan(core::List<self::Constraint> sources) → self::Plan
     ;
   method extractPlanFromConstraints(core::List<self::Constraint> constraints) → self::Plan
     ;
   method addPropagate(self::Constraint c, core::int mark) → core::bool
     ;
   method removePropagateFrom(self::Variable out) → core::List<self::Constraint>
     ;
   method addConstraintsConsumingTo(self::Variable v, core::List<self::Constraint> coll) → void
     ;
 }
 class Plan extends core::Object {
   field core::List<self::Constraint> list;
-  constructor •() → void
+  default constructor •() → void
     ;
   method addConstraint(self::Constraint c) → void
     ;
   method size() → core::int
     ;
   method execute() → void
     ;
 }
 static const field dynamic REQUIRED;
 static const field dynamic STRONG_PREFERRED;
 static const field dynamic PREFERRED;
 static const field dynamic STRONG_DEFAULT;
 static const field dynamic NORMAL;
 static const field dynamic WEAK_DEFAULT;
 static const field dynamic WEAKEST;
 static const field core::int NONE;
 static const field core::int FORWARD;
 static const field core::int BACKWARD;
 static field self::Planner planner;
 static method main() → dynamic
   ;
 static method chainTest(core::int n) → void
   ;
 static method projectionTest(core::int n) → void
   ;
 static method change(self::Variable v, core::int newValue) → void
   ;