Implement type inference for try/catch blocks.

pkg/kernel/lib/core_types.dart

 // Copyright (c) 2016, 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.
 library kernel.core_types;
 
 import 'ast.dart';
 import 'library_index.dart';
 
 /// Provides access to the classes and libraries in the core libraries.
 class CoreTypes {
@@ skipping 53 matching lines @@
   Procedure _printProcedure;
   Procedure _identicalProcedure;
   Constructor _constantExpressionErrorDefaultConstructor;
   Constructor _fallThroughErrorUrlAndLineConstructor;
   Constructor _compileTimeErrorDefaultConstructor;
 
   Class _internalSymbolClass;
 
   Library _asyncLibrary;
   Class _futureClass;
+  Class _stackTraceClass;
   Class _streamClass;
   Class _completerClass;
   Class _futureOrClass;
   Procedure _completerSyncConstructor;
   Procedure _futureMicrotaskConstructor;
   Constructor _syncIterableDefaultConstructor;
   Constructor _streamIteratorDefaultConstructor;
   Constructor _asyncStarStreamControllerDefaultConstructor;
   Procedure _asyncThenWrapperHelperProcedure;
   Procedure _asyncErrorWrapperHelperProcedure;
@@ skipping 144 matching lines @@
   }
 
   Class get objectClass {
     return _objectClass ??= _index.getClass('dart:core', 'Object');
   }
 
   Procedure get printProcedure {
     return _printProcedure ??= _index.getTopLevelMember('dart:core', 'print');
   }
 
+  Class get stackTraceClass {
+    return _stackTraceClass ??= _index.getClass('dart:core', 'StackTrace');
+  }
+
   Class get streamClass {
     return _streamClass ??= _index.getClass('dart:async', 'Stream');
   }
 
   Constructor get streamIteratorDefaultConstructor {
     return _streamIteratorDefaultConstructor ??=
         _index.getMember('dart:async', '_StreamIterator', '');
   }
 
   Class get stringClass {
@@ skipping 21 matching lines @@
   Constructor get fallThroughErrorUrlAndLineConstructor {
     return _fallThroughErrorUrlAndLineConstructor ??=
         _index.getMember('dart:core', 'FallThroughError', '_create');
   }
 
   Constructor get compileTimeErrorDefaultConstructor {
     return _compileTimeErrorDefaultConstructor ??=
         _index.getMember('dart:core', '_CompileTimeError', '');
   }
 }