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# Copyright 2018 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build/config/chrome_build.gni")
import("//build/config/coverage/coverage.gni")
import("//build/config/sanitizers/sanitizers.gni")
declare_args() {
# Optimize parts of Chrome's UI written with web technologies (HTML/CSS/JS)
# for runtime performance purposes. This does more work at compile time for
# speed benefits at runtime (so we skip in debug builds).
optimize_webui = !is_debug
# Enable the WebUI version of the browser's tab strip.
enable_webui_tab_strip = is_chromeos || is_linux || is_win
# Whether to inline source maps during build. Cannot be enabled when
# `optimize_webui=true`.
enable_webui_inline_sourcemaps = use_javascript_coverage
# Flag used for loading WebUI files directly from disk instead of .pak files.
# It causes additional file path info for each file to be added into Grit
# generated '*_resource_map.cc' files during the build, which is then used at
# runtime to read such files.
# Meant to be used during local development only (requires a local checkout
# and build) with the runtime --load-webui-from-disk command line switch.
load_webui_from_disk = false
# Enable generation of compiled JS bytecode for opted-in WebUI scripts for
# compatible build configurations (see comment for the
# `enable_webui_generate_code_cache` update below).
enable_webui_generate_code_cache = true
}
# Build-time WebUI code caching is only used in optimize_webui builds. When the
# host and current toolchains are the same there are issues instrumenting the
# code_cache_generator msan binaries, see crbug.com/40055221#comment17.
# TODO(crbug.com/399764218): Enable this build-step on cross-compiled builds.
# This is necessary for universalized mac builds that produce x64 / arm64 chrome
# builds in the same package.
if (enable_webui_generate_code_cache) {
enable_webui_generate_code_cache =
optimize_webui && host_toolchain == current_toolchain && !is_msan &&
(is_linux || is_win)
}
if (load_webui_from_disk) {
assert(is_linux || is_mac || is_win || is_chromeos,
"load_webui_from_disk not available")
}
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