Remove GYP annotations from chrome, ui, tools GN files.

tools/android/BUILD.gn

 # Copyright 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.
 
 # Intermediate target grouping the android tools needed to run native
 # unittests and instrumentation test apks.
-#
-# GYP: //tools/android/android_tools.gyp:android_tools
 group("android_tools") {
   deps = [
     "//build/android:wrapper_scripts",
     "//third_party/android_platform:stack_wrapper",
     "//third_party/catapult/telemetry:bitmaptools($host_toolchain)",
     "//tools/android/adb_reboot",
     "//tools/android/file_poller",
     "//tools/android/forwarder2",
     "//tools/android/md5sum",
     "//tools/android/memtrack_helper:memtrack_helper",
     "//tools/android/purge_ashmem",
     "//tools/perf:run_benchmark_wrapper",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:memdump
 group("memdump") {
   deps = [
     "//tools/android/memdump",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:memconsumer
 group("memconsumer") {
   deps = [
     "//tools/android/memconsumer:memconsumer_apk",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:memtrack_helper
 group("memtrack_helper") {
   deps = [
     "//tools/android/memtrack_helper",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:ps_ext
 group("ps_ext") {
   deps = [
     "//tools/android/ps_ext",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:spnego_authenticator
 group("spnego_authenticator") {
   testonly = true
   deps = [
     "//tools/android/kerberos/SpnegoAuthenticator:spnego_authenticator_apk",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:customtabs_benchmark
 group("customtabs_benchmark") {
   deps = [
     "//tools/android/customtabs_benchmark:customtabs_benchmark_apk",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:audio_focus_grabber
 group("audio_focus_grabber") {
   testonly = true
   deps = [
     "//tools/android/audio_focus_grabber:audio_focus_grabber_apk",
   ]
 }
 
-# GYP: //tools/android/android_tools.gyp:push_apps_to_background
 group("push_apps_to_background") {
   testonly = true
   deps = [
     "//tools/android/push_apps_to_background:push_apps_to_background_apk",
   ]
 }