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

tests/language/operator5_test.dart

Index: tests/language/operator5_test.dart
diff --git a/tests/language/operator5_test.dart b/tests/language/operator5_test.dart
index 52c9bcb9894e0c0fc20a29483499c2a5c3edf8e5..3afb2ebe57c73970a4c871b27d7c69e4862aa2f0 100644
--- a/tests/language/operator5_test.dart
+++ b/tests/language/operator5_test.dart
@@ -14,7 +14,7 @@ class A {
 equals(a) {
   try {
     Expect.equals(1, a == a);
-  } catch(TypeError e) {
+  } on TypeError catch (e) {
     // In checked mode the test doesn't do anything.
   }
 }
@@ -22,25 +22,25 @@ equals(a) {
 less(a) {
   try {
     Expect.equals(null, a < a);
-  } catch(TypeError e) {}
+  } on TypeError catch (e) {}
 }
 
 lessEqual(a) {
   try {
     Expect.equals(499, a <= a);
-  } catch(TypeError e) {}
+  } on TypeError catch (e) {}
 }
 
 greater(a) {
   try {
     Expect.equals("foo", a > a);
-  } catch(TypeError e) {}
+  } on TypeError catch (e) {}
 }
 
 greaterEqual(a) {
   try {
     Expect.equals(42, a >= a);
-  } catch(TypeError e) {}
+  } on TypeError catch (e) {}
 }
 
 main() {