Try to fix bitmaptools declaration in gn_migration.gypi.

build/gn_migration.gypi

 # Copyright (c) 2015 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 defines three targets that we are using to
 # track the progress of the GYP->GN migration:
 #
 # If you run 'ninja gn_build gyp_remaining gyp_groups', and then
 # run 'ninja', the second ninja invocation should do nothing. This
 # indicates that everything built by a ninja build is in fact
@@ skipping 156 matching lines @@
             '../chrome/chrome.gyp:sync_integration_tests',
             '../chrome/chrome.gyp:unit_tests',
             '../extensions/extensions_tests.gyp:extensions_browsertests',
             '../extensions/extensions_tests.gyp:extensions_unittests',
             '../google_apis/gcm/gcm.gyp:gcm_unit_tests',
             '../ipc/ipc.gyp:ipc_tests',
             '../jingle/jingle.gyp:jingle_unittests',
             '../net/net.gyp:net_unittests',
             #"//ppapi/examples",
             '../third_party/pdfium/samples/samples.gyp:pdfium_test',
-            '../tools/imagediff/imagediff.gyp:imagediff',
-            '../tools/telemetry/telemetry.gyp:bitmaptools',
             '../tools/gn/gn.gyp:gn',
             '../tools/gn/gn.gyp:gn_unittests',
             '../ui/app_list/app_list.gyp:app_list_unittests',
             '../url/url.gyp:url_unittests',
           ],
         }],
         ['OS=="linux"', {
           'dependencies': [
             '../sandbox/sandbox.gyp:chrome_sandbox',
             '../sandbox/sandbox.gyp:sandbox_linux_unittests',
@@ skipping 226 matching lines @@
             '../sync/tools/sync_tools.gyp:sync_client',
             '../sync/tools/sync_tools.gyp:sync_listen_notifications',
             '../testing/gmock.gyp:gmock_main',
             '../third_party/leveldatabase/leveldatabase.gyp:env_chromium_unittests',
             '../third_party/libphonenumber/libphonenumber.gyp:libphonenumber_unittests',
             '../third_party/libaddressinput/libaddressinput.gyp:libaddressinput_unittests',
             '../third_party/webrtc/tools/tools.gyp:frame_analyzer',
             '../third_party/webrtc/tools/tools.gyp:rgba_to_i420_converter',
             '../tools/gn/gn.gyp:generate_test_gn_data',
             '../tools/perf/clear_system_cache/clear_system_cache.gyp:clear_system_cache',
-            '../tools/telemetry/telemetry.gyp:bitmaptools',
+            #'../tools/telemetry/telemetry.gyp:bitmaptools', TODO(GYP) should this be #host ?
             '../ui/app_list/app_list.gyp:app_list_demo',
             '../ui/compositor/compositor.gyp:compositor_unittests',
             '../ui/message_center/message_center.gyp:message_center_unittests',
             '../ui/views/examples/examples.gyp:views_examples_with_content_exe',
             '../v8/tools/gyp/v8.gyp:v8_snapshot',
             '../v8/tools/gyp/v8.gyp:postmortem-metadata',
 
             # TODO(GYP) - list all of the examples explicitly.
             '../ppapi/ppapi_internal.gyp:*',
           ],
@@ skipping 59 matching lines @@
         'chromium_builder_perf',
         'chromium_builder_tests',
         'chromium_builder_webrtc',
         'chromium_gpu_builder',
         'chromium_gpu_debug_builder',
       ],
     },
       ]
 }