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

tests/language/type_cast_vm_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=--no_show_internal_names
 //
 // Dart test program testing type casts.
 
 // Test that the initializer expression gets properly skipped.
 bool b = "foo" as double;
 
 class TypeTest {
   static test() {
     int result = 0;
     try {
       var i = "hello" as int;  // Throws a CastException
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 1;
       Expect.isTrue(error is CastException);
       Expect.equals("int", error.dstType);
       Expect.equals("String", error.srcType);
       Expect.equals("type cast", error.dstName);
       int pos = error.url.lastIndexOf("/", error.url.length);
       if (pos == -1) {
         pos = error.url.lastIndexOf("\\", error.url.length);
       }
       String subs = error.url.substring(pos + 1, error.url.length);
       Expect.equals("type_cast_vm_test.dart", subs);
       Expect.equals(15, error.line);
       Expect.equals(23, error.column);
     }
     return result;
   }
 
   static testSideEffect() {
     int result = 0;
     int index() {
       result++;
       return 0;
     }
     try {
       var a = new List<int>(1) as List<int>;
       a[0] = 0;
       a[index()]++;  // Type check succeeds, but does not create side effects.
       Expect.equals(1, a[0]);
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 100;
     }
     return result;
   }
 
   static testArgument() {
     int result = 0;
     int f(int i) {
       return i;
     }
     try {
       int i = f("hello" as int);  // Throws a CastException
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 1;
       Expect.isTrue(error is CastException);
       Expect.equals("int", error.dstType);
       Expect.equals("String", error.srcType);
       Expect.equals("type cast", error.dstName);
       int pos = error.url.lastIndexOf("/", error.url.length);
       if (pos == -1) {
         pos = error.url.lastIndexOf("\\", error.url.length);
       }
       String subs = error.url.substring(pos + 1, error.url.length);
       Expect.equals("type_cast_vm_test.dart", subs);
       Expect.equals(57, error.line);
       Expect.equals(25, error.column);
     }
     return result;
   }
 
   static testReturn() {
     int result = 0;
     int f(String s) {
       return s as int;  // Throws a CastException
     }
     try {
       int i = f("hello");
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 1;
       Expect.isTrue(error is CastException);
       Expect.equals("int", error.dstType);
       Expect.equals("String", error.srcType);
       Expect.equals("type cast", error.dstName);
       int pos = error.url.lastIndexOf("/", error.url.length);
       if (pos == -1) {
         pos = error.url.lastIndexOf("\\", error.url.length);
       }
       String subs = error.url.substring(pos + 1, error.url.length);
       Expect.equals("type_cast_vm_test.dart", subs);
       Expect.equals(79, error.line);
       Expect.equals(16, error.column);
     }
     return result;
   }
 
   static var field = "hello";
   static testField() {
     int result = 0;
     Expect.equals(5, (field as String).length);
     try {
       field as int;  // Throws a CastException
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 1;
       Expect.equals("int", error.dstType);
       Expect.equals("String", error.srcType);
       Expect.equals("type cast", error.dstName);
       int pos = error.url.lastIndexOf("/", error.url.length);
       if (pos == -1) {
         pos = error.url.lastIndexOf("\\", error.url.length);
       }
       String subs = error.url.substring(pos + 1, error.url.length);
       Expect.equals("type_cast_vm_test.dart", subs);
       Expect.equals(106, error.line);
       Expect.equals(13, error.column);
     }
     return result;
   }
 
   static testAnyFunction() {
     int result = 0;
     Function anyFunction;
     f() { };
     anyFunction = f as Function;  // No error.
     anyFunction = null as Function;  // No error.
     try {
       var i = f as int;  // Throws a TypeError if type checks are enabled.
-    } catch (TypeError error) {
+    } on TypeError catch (error) {
       result = 1;
       Expect.equals("int", error.dstType);
       Expect.equals("() => Dynamic", error.srcType);
       Expect.equals("type cast", error.dstName);
       int pos = error.url.lastIndexOf("/", error.url.length);
       if (pos == -1) {
         pos = error.url.lastIndexOf("\\", error.url.length);
       }
       String subs = error.url.substring(pos + 1, error.url.length);
       Expect.equals("type_cast_vm_test.dart", subs);
@@ skipping 10 matching lines @@
     Expect.equals(1, testReturn());
     Expect.equals(1, testField());
     Expect.equals(1, testAnyFunction());
   }
 }
 
 
 main() {
   TypeTest.testMain();
 }