Print only the focused frame. This makes more sense than trying to print all...

chrome/chrome.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 3203 matching lines @@
         'browser/tab_contents/test_web_contents.cc',
         'browser/tab_contents/test_web_contents.h',
         'common/ipc_test_sink.cc',
         'common/ipc_test_sink.h',
         'renderer/mock_keyboard.cc',
         'renderer/mock_keyboard.h',
         'renderer/mock_keyboard_driver_win.cc',
         'renderer/mock_keyboard_driver_win.h',
         'renderer/mock_printer.cc',
         'renderer/mock_printer.h',
-        'renderer/mock_printer_driver_win.cc',
-        'renderer/mock_printer_driver_win.h',
         'renderer/mock_render_process.h',
         'renderer/mock_render_thread.cc',
         'renderer/mock_render_thread.h',
         'test/automation/autocomplete_edit_proxy.cc',
         'test/automation/autocomplete_edit_proxy.h',
         'test/automation/automation_constants.h',
         'test/automation/automation_handle_tracker.cc',
         'test/automation/automation_handle_tracker.h',
         'test/automation/automation_proxy.cc',
         'test/automation/automation_proxy.h',
@@ skipping 1793 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }