Adding in-browser correctness testing via selenium.

tools/testing/test_case.py

 # Copyright (c) 2011, 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.
 
 """Common TestCase subclasses used to define a single test."""
 
 import os
 import tempfile
 
 import test
@@ skipping 75 matching lines @@
     if self.kind == 'compile-time error':
       return True
     if self.kind == 'runtime error':
       return True
     if self.kind == 'static type error':
       return self.run_arch.HasFatalTypeErrors()
     return False
 
 
 class BrowserTestCase(StandardTestCase):
-  """A test case that executes inside a browser (or DumpRenderTree)."""
+  """A test case that executes inside DumpRenderTree."""
 
   def __init__(self, context, path, filename,
                fatal_static_type_errors, mode, arch, component, vm_options=None):
     super(BrowserTestCase, self).__init__(
         context, path, filename, mode, arch, component, vm_options)
     self.fatal_static_type_errors = fatal_static_type_errors
 
   def Run(self):
     """Optionally compiles and then runs the specified test."""
     command = self.run_arch.GetCompileCommand(self.fatal_static_type_errors)
@@ skipping 54 matching lines @@
             self.filename]
 
     return cmd
 
   def GetName(self):
     return self.path[-1]
 
   def Cleanup(self):
     if not self.context.keep_temporary_files:
       self.run_arch.Cleanup()