Don't autostart Chromevox in tests when a braille display is connected.

chrome/browser/extensions/api/braille_display_private/brlapi_connection.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_BRAILLE_DISPLAY_PRIVATE_BRLAPI_CONNECTION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_BRAILLE_DISPLAY_PRIVATE_BRLAPI_CONNECTION_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 19 matching lines @@
 
   virtual ~BrlapiConnection();
 
   virtual ConnectResult Connect(const OnDataReadyCallback& onDataReady) = 0;
 
   virtual void Disconnect() = 0;
 
   virtual bool Connected() = 0;
 
   // Gets the last brlapi error on this thread.
-  // This works ismilar to errno in C.  There's one thread-local error
+  // This works similar to errno in C.  There's one thread-local error
   // value, meaning that this method should be called after any
   // other method of this class that can return an error without calling
   // another method in between.  This class is not thread safe.
   virtual brlapi_error_t* BrlapiError() = 0;
 
   // Gets a description of the last brlapi error for this thread, useful
   // for logging.
   virtual std::string BrlapiStrError() = 0;
 
   // Gets the total size of the display, which may be 0 if no display is
@@ skipping 14 matching lines @@
  protected:
   BrlapiConnection();
   DISALLOW_COPY_AND_ASSIGN(BrlapiConnection);
 };
 
 }  // namespace braille_display_private
 }  // namespace api
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_BRAILLE_DISPLAY_PRIVATE_BRLAPI_CONNECTION_H_