Load devtools files from resources.pak rather than from disk take 2.

chrome/chrome_dll.gypi

 # Copyright (c) 2010 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.
 {
   'target_defaults': {
     'variables': {
       'chrome_dll_target': 0,
     },
     'target_conditions': [
       ['chrome_dll_target==1', {
@@ skipping 355 matching lines @@
                     '-s', '<(SHARED_INTERMEDIATE_DIR)',
                     '-x', '<(INTERMEDIATE_DIR)',
                     '<@(locales)',
                   ],
                 },
                 {
                   'action_name': 'repack_resources',
                   'variables': {
                     'pak_inputs': [
                       '<(grit_out_dir)/component_extension_resources.pak',
+                      '<(grit_out_dir)/devtools_resources.pak',
                       '<(grit_out_dir)/net_internals_resources.pak',
                       '<(grit_out_dir)/shared_resources.pak',
                       '<(grit_out_dir)/sync_internals_resources.pak',
                     ],
                   },
                   'inputs': [
                     '<(repack_path)',
                     '<@(pak_inputs)',
                   ],
                   'outputs': [
@@ skipping 239 matching lines @@
                   'LinkIncremental': '<(msvs_debug_link_nonincremental)',
                 },
               },
             },
           },
         },  # target chrome_dll
       ],
     }],
   ],
 }