Deprecate Math object in corelib in favor of dart:math library.

pkg/fixnum/test/int_64_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.
 
 // A test to compare the results of the fixnum library with the Dart VM
 
 #library('int64vmtest');
+#import('dart:math', prefix: 'Math');
 #source('../intx.dart');
 #source('../int32.dart');
 #source('../int64.dart');
 
 void main() {
   int64VMTest test = new int64VMTest();
   test.doTestBinary(new BinaryOp("&", (a, b) => a & b));
   test.doTestBinary(new BinaryOp("|", (a, b) => a | b));
   test.doTestBinary(new BinaryOp("^", (a, b) => a ^ b));
   test.doTestBinary(new BinaryOp("+", (a, b) => a + b));
@@ skipping 298 matching lines @@
       }
     }
     for (int i = 0; i < RANDOM_TESTS; i++) {
       int64 randomLong = _randomInt64();
       for (int shift = -64; shift <= 64; shift++) {
         _doTestShift(op, randomLong, shift);
       }
     }
   }
 }