Starting work on full GN build

build/config/ui.gni

Index: build/config/ui.gni
diff --git a/build/config/ui.gni b/build/config/ui.gni
deleted file mode 100644
index c2dff4a87df8ba4f5cbba4bb47d39f3552c12e33..0000000000000000000000000000000000000000
--- a/build/config/ui.gni
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-# Copyright 2014 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 contains UI-related build flags. It should theoretically be in the
-# src/ui directory and only things that depend on the ui module should get the
-# definitions.
-#
-# However, today we have many "bad" dependencies on some of these flags from,
-# e.g. base, so they need to be global.
-#
-# See also build/config/features.gni
-
-declare_args() {
-  # Indicates if Ash is enabled. Ash is the Aura Shell which provides a
-  # desktop-like environment for Aura. Requires use_aura = true
-  use_ash = is_win || is_linux
-
-  # Indicates if Ozone is enabled. Ozone is a low-level library layer for Linux
-  # that does not require X11.
-  use_ozone = false
-
-  # Indicates if GLFW is enabled. GLFW is an abstraction layer for the
-  # windowing system and OpenGL rendering, providing cross-platform support
-  # for creating windows and OpenGL surfaces and contexts, and handling
-  # window system events and input.
-  use_glfw = false
-
-  # Support ChromeOS touchpad gestures with ozone.
-  use_evdev_gestures = false
-
-  # Indicates if Aura is enabled. Aura is a low-level windowing library, sort
-  # of a replacement for GDI or GTK.
-  use_aura = is_win || is_linux
-
-  # True means the UI is built using the "views" framework.
-  toolkit_views = is_mac || is_win || is_chromeos || use_aura
-
-  # Whether the entire browser uses toolkit-views on Mac instead of Cocoa.
-  mac_views_browser = false
-
-  # Whether we should use glib, a low level C utility library.
-  use_glib = is_linux && !use_ozone
-}
-
-# Additional dependent variables -----------------------------------------------
-#
-# These variables depend on other variables and can't be set externally.
-
-use_cairo = false
-use_pango = false
-
-# Use GPU accelerated cross process image transport by default on linux builds
-# with the Aura window manager.
-ui_compositor_image_transport = use_aura && is_linux
-
-use_default_render_theme = use_aura || is_linux
-
-# Indicates if the UI toolkit depends on X11.
-use_x11 = is_linux && !use_ozone && !use_glfw
-
-use_ozone_evdev = use_ozone
-
-use_clipboard_aurax11 = is_linux && use_aura && use_x11
-
-enable_hidpi = is_mac || is_chromeos || is_win || is_linux
-
-enable_topchrome_md = false