Run tree shaking in strong-mode baseline tests.

pkg/kernel/testcases/strong-mode/DeltaBlue.baseline.txt

 // dynamic is not a subtype of dart.core::int (DeltaBlue.dart:139:16)
 library;
 import self as self;
 import "dart:core" as core;
 
 class DeltaBlue extends core::Object {
   constructor •() → void
     : super core::Object::•()
     ;
   method run() → void {
@@ skipping 11 matching lines @@
     return const <self::Strength>[self::STRONG_PREFERRED, self::PREFERRED, self::STRONG_DEFAULT, self::NORMAL, self::WEAK_DEFAULT, self::WEAKEST].{core::List::[]}(this.{self::Strength::value});
   static method stronger(self::Strength s1, self::Strength s2) → core::bool {
     return s1.{self::Strength::value}.{core::num::<}(s2.{self::Strength::value});
   }
   static method weaker(self::Strength s1, self::Strength s2) → core::bool {
     return s1.{self::Strength::value}.{core::num::>}(s2.{self::Strength::value});
   }
   static method weakest(self::Strength s1, self::Strength s2) → self::Strength {
     return self::Strength::weaker(s1, s2) ? s1 : s2;
   }
-  static method strongest(self::Strength s1, self::Strength s2) → self::Strength {
-    return self::Strength::stronger(s1, s2) ? s1 : s2;
-  }
 }
 abstract class Constraint extends core::Object {
   final field self::Strength strength;
   const constructor •(self::Strength strength) → void
     : self::Constraint::strength = strength, super core::Object::•()
     ;
   abstract method isSatisfied() → core::bool;
   abstract method markUnsatisfied() → void;
   abstract method addToGraph() → void;
   abstract method removeFromGraph() → void;
@@ skipping 308 matching lines @@
   }
 }
 class Plan extends core::Object {
   field core::List<self::Constraint> list = <self::Constraint>[];
   constructor •() → void
     : super core::Object::•()
     ;
   method addConstraint(self::Constraint c) → void {
     this.{self::Plan::list}.{core::List::add$cc}(c);
   }
-  method size() → core::int
-    return this.{self::Plan::list}.{core::List::length};
   method execute() → void {
     for (core::int i = 0; i.{core::num::<}(this.{self::Plan::list}.{core::List::length}); i = i.{core::num::+}(1)) {
       this.{self::Plan::list}.{core::List::[]}(i).{self::Constraint::execute}();
     }
   }
 }
 static const field self::Strength REQUIRED = const self::Strength::•(0, "required");
 static const field self::Strength STRONG_PREFERRED = const self::Strength::•(1, "strongPreferred");
 static const field self::Strength PREFERRED = const self::Strength::•(2, "preferred");
 static const field self::Strength STRONG_DEFAULT = const self::Strength::•(3, "strongDefault");
@@ skipping 67 matching lines @@
 }
 static method change(self::Variable v, core::int newValue) → void {
   self::EditConstraint edit = new self::EditConstraint::•(v, self::PREFERRED);
   self::Plan plan = self::planner.{self::Planner::extractPlanFromConstraints}(<self::EditConstraint>[edit]);
   for (core::int i = 0; i.{core::num::<}(10); i = i.{core::num::+}(1)) {
     v.{self::Variable::value} = newValue;
     plan.{self::Plan::execute}();
   }
   edit.{self::Constraint::destroyConstraint}();
 }