Use windows keycodes under linux (and all non-windows platforms).

chrome/browser/automation/ui_controls.h

 // Copyright (c) 2009 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_AUTOMATION_UI_CONTROLS_H_
 #define CHROME_BROWSER_AUTOMATION_UI_CONTROLS_H_
 
 #include "build/build_config.h"
 
 #include <string>
@@ skipping 24 matching lines @@
 //
 //   SendKeyPress(...);
 //   SendKeyPressNotifyWhenDone(..., task);
 //
 // might trigger |task| early.
 //
 // Note: Windows does not currently do anything with the |window| argument for
 // these functions, so passing NULL is ok.
 
 // Send a key press with/without modifier keys.
+// |key| should be a VKEY code as defined in base/keyboard_codes.h
 bool SendKeyPress(gfx::NativeWindow window, wchar_t key, bool control,
                   bool shift, bool alt);
 bool SendKeyPressNotifyWhenDone(gfx::NativeWindow window, wchar_t key,
                                 bool control, bool shift,
                                 bool alt, Task* task);
 
 // Simulate a mouse move. (x,y) are absolute screen coordinates.
 bool SendMouseMove(long x, long y);
 bool SendMouseMoveNotifyWhenDone(long x, long y, Task* task);
 
@@ skipping 25 matching lines @@
 #elif defined(OS_LINUX)
     GtkWidget* widget,
 #endif
     MouseButton button,
     int state,
     Task* task);
 
 }  // ui_controls
 
 #endif  // CHROME_BROWSER_AUTOMATION_UI_CONTROLS_H_