Update language tests to new optional parameter syntax and semantics.

tests/language/closure7_test.dart

Index: tests/language/closure7_test.dart
===================================================================
--- tests/language/closure7_test.dart	(revision 12414)
+++ tests/language/closure7_test.dart	(working copy)
@@ -7,12 +7,12 @@
 class A {
   foo() => 499;
   fooo() => 4999;  // Implicit closure class can be shared with foo.
-  bar(x, [y = 8, z = 10]) => "1 $x $y $z";
-  gee(x, [y = 9, z = 11]) => "2 $x $y $z";  // Must not be shared with "bar".
-  toto(x, [y = 8, z = 10]) => "3 $x $y $z";  // Could be shared with "bar".
+  bar(x, {y: 8, z: 10}) => "1 $x $y $z";
+  gee(x, {y: 9, z: 11}) => "2 $x $y $z";  // Must not be shared with "bar".
+  toto(x, {y: 8, z: 10}) => "3 $x $y $z";  // Could be shared with "bar".
 
-  fisk(x, [y = 8, zz = 10]) => "4 $x $y $zz";
-  titi(x, [y = 8, zz = 77]) => "5 $x $y $zz";  // Could be shared with "fisk",
+  fisk(x, {y: 8, zz: 10}) => "4 $x $y $zz";
+  titi(x, {y: 8, zz: 77}) => "5 $x $y $zz";  // Could be shared with "fisk",
                                           // because default-val is never used.
 }
 
@@ -21,11 +21,11 @@
   // of A.
   foo() => 4990;
   fooo() => 49990;
-  bar(x, [y = 8, z = 10]) => "1B $x $y $z";
-  gee(x, [y = 9, z = 11]) => "2B $x $y $z";
-  toto(x, [y = 8, z = 10]) => "3B $x $y $z";
-  fisk(x, [y = 8, zz = 10]) => "4B $x $y $zz";
-  titi(x, [y = 8, zz = 77]) => "5B $x $y $zz";
+  bar(x, {y: 8, z: 10}) => "1B $x $y $z";
+  gee(x, {y: 9, z: 11}) => "2B $x $y $z";
+  toto(x, {y: 8, z: 10}) => "3B $x $y $z";
+  fisk(x, {y: 8, zz: 10}) => "4B $x $y $zz";
+  titi(x, {y: 8, zz: 77}) => "5B $x $y $zz";
 }
 
 
@@ -89,8 +89,8 @@
   Expect.equals("5 311 8 987", titiA(311, zz: 987));
   Expect.equals("5B 311 8 987", titiB(311, zz: 987));
 
-  Expect.equals("4 311 765 987", fiskA(311, 765, 987));
-  Expect.equals("4B 311 765 987", fiskB(311, 765, 987));
-  Expect.equals("5 311 765 987", titiA(311, 765, 987));
-  Expect.equals("5B 311 765 987", titiB(311, 765, 987));
+  Expect.equals("4 311 765 987", fiskA(311, y: 765, zz: 987));
+  Expect.equals("4B 311 765 987", fiskB(311, y: 765, zz: 987));
+  Expect.equals("5 311 765 987", titiA(311, y: 765, zz: 987));
+  Expect.equals("5B 311 765 987", titiB(311, y: 765, zz: 987));
 }