Update almost all tests (except co19) to use the new try-catch syntax.

tests/language/getter_no_setter_test.dart

Index: tests/language/getter_no_setter_test.dart
diff --git a/tests/language/getter_no_setter_test.dart b/tests/language/getter_no_setter_test.dart
index 04298df7fe4bde792d85d0ec11fc6a9b5bb9fd2b..eb8075a0eea97a6cedbc4af513a135a26348edd2 100644
--- a/tests/language/getter_no_setter_test.dart
+++ b/tests/language/getter_no_setter_test.dart
@@ -11,7 +11,7 @@ class Example {
       bool flag_exception = false;
       try {
         nextVar = 1;  // Equivalent to this.nextVar = 1.
-      } catch (var excpt) {
+      } catch (excpt) {
         flag_exception = true;
       }
       Expect.isTrue(flag_exception);
@@ -20,7 +20,7 @@ class Example {
       bool flag_exception = false;
       try {
         this.nextVar = 1;  /// 00: static type warning
-      } catch (var excpt) {
+      } catch (excpt) {
         flag_exception = true;
       }
       Expect.isTrue(flag_exception);   /// 00: continued