Improve pyautolib errors.

chrome/test/pyautolib/pyautolib.h

 // Copyright (c) 2012 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.
 //
 // This file declares the C++ side of PyAuto, the python interface to
 // Chromium automation.  It access Chromium's internals using Automation Proxy.
 
 #ifndef CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 #define CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 
@@ skipping 53 matching lines @@
   }
 
   virtual ProxyLauncher* CreateProxyLauncher() OVERRIDE;
 
   // SetUp,TearDown is redeclared as public to make it accessible from swig.
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
   // AutomationProxy methods
 
-  // Get a handle to browser window at the given index, or NULL on failure.
-  scoped_refptr<BrowserProxy> GetBrowserWindow(int window_index);
-
   // Meta-methods.  Generic pattern of passing args and response as
   // JSON dict to avoid future use of the SWIG interface and
   // automation proxy additions.  Returns response as JSON dict.
   // Use -ve window_index for automation calls not targetted at a browser
   // window.  Example: Login call for chromeos.
   std::string _SendJSONRequest(int window_index,
                                const std::string& request,
                                int timeout);
 
   // Sets a cookie value for a url. Returns true on success.
@@ skipping 42 matching lines @@
   // This is necessary since python's unittest module creates instances of
   // TestCase at load time itself.
   static MessageLoop* GetSharedMessageLoop(MessageLoop::Type msg_loop_type);
   static MessageLoop* message_loop_;
 
   // Path to named channel id.
   std::string named_channel_id_;
 };
 
 #endif  // CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_