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

tools/cygprofile/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.
 
-# GYP: //tools/cygprofile/cygprofile.gyp:cygprofile
 static_library("cygprofile") {
   sources = [
     "cygprofile.cc",
     "cygprofile.h",
   ]
 
   configs -= [ "//build/config/android:default_cygprofile_instrumentation" ]
   configs += [ "//build/config/android:no_cygprofile_instrumentation" ]
 
   deps = [
     # This adds uninstrumented symbols to the static library from base.
     # These symbols are likely *not* to be used because there are many other
     # duplicates in other objects/libraries.
     "//base",
   ]
 }
 
-# GYP: //tools/cygprofile/cygprofile.gyp:cygprofile_unittests
 executable("cygprofile_unittests") {
   testonly = true
 
   sources = [
     "cygprofile_unittest.cc",
   ]
 
   configs -= [ "//build/config/android:default_cygprofile_instrumentation" ]
   configs += [ "//build/config/android:no_cygprofile_instrumentation" ]
 
   deps = [
     ":cygprofile",
     "//base",
     "//testing/gtest",
   ]
 }