ceil/floor/truncate/round return integers.

tests/language/language_dart2js.status

 # 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.
 
 [ $compiler == dart2js || $compiler == dart2dart ]
 class_literal_test/01: Fail # Class literals are expression now; delete this test.
 class_literal_test/02: Fail # Class literals are expression now; delete this test.
 class_literal_test/05: Fail # Class literals are expression now; delete this test.
 class_literal_test/06: Fail # Class literals are expression now; delete this test.
 class_literal_test/07: Fail # Class literals are expression now; delete this test.
@@ skipping 286 matching lines @@
 
 final_syntax_test/01: Fail # Missing error for uninitialized final field.
 final_syntax_test/02: Fail # Missing error for uninitialized final field.
 final_syntax_test/03: Fail # Missing error for uninitialized final field.
 final_syntax_test/04: Fail # Missing error for uninitialized final field.
 const_syntax_test/01: Fail # Missing error for uninitialized final field.
 const_syntax_test/02: Fail # Missing error for uninitialized final field.
 const_syntax_test/03: Fail # Missing error for uninitialized final field.
 
 canonical_const2_test: Fail, OK # Dart2js only has doubles.
-div_by_zero_test: Fail, OK # Dart2js only has doubles.
 
 bit_operations_test: Fail, OK # Tests bit operations outside the 32 bit range.
 # The following test will start to fail again once dart2js implements the
 # runtime semantics for numbers.
 # Should be: Fail, OK # Expects negative results of bit-operations.
 optimization_test: Fail, OK # Expects negative results of bit-operations.
 
 expect_test: Fail, OK # JavaScript canonicalizes all strings. This test assumes that string-concatenation returns a new string.
 
 # Partially implemented redirecting constructors makes this throw instead
@@ skipping 36 matching lines @@
 call_through_null_getter_test: Fail
 closure3_test: Fail
 execute_finally3_test: Fail
 method_invocation_test: Fail
 null_pointer_exception_test: Fail
 stack_overflow_test: Fail
 stack_overflow_stacktrace_test: Fail
 string_interpolate_npe_test: Fail
 closure_call_wrong_argument_count_negative_test: Skip
 label_test: Skip