[fuchsia] Add host chromedriver build and CIPD package.

* Add the host chromedriver binary as part of the Fuchsia build.
* Add a CIPD package to upload a stripped chromedriver binary.

Bug: IN-1321 (Fuchsia internal)
Change-Id: Ia414914304ede7a54ff097365bb72cba6674e5ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1719377
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Auto-Submit: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682114}

BUILD.gn

@@ -545,6 +545,10 @@ group("gn_all") {
     }
   }
 
+  if (is_fuchsia) {
+    deps += [ "//chrome/test/chromedriver:chromedriver($host_toolchain)" ]
+  }
+
   if (is_android || (is_linux && !is_chromeos)) {
     deps += [
       "//components/network_hints/browser",

fuchsia/cipd/BUILD.gn

@@ -145,6 +145,49 @@ cipd_archive("http") {
   ]
 }
 
+_stripped_chromedriver_file = "${root_out_dir}/clang_x64/stripped/chromedriver"
+
+action("strip_chromedriver_binary") {
+  testonly = true
+
+  prog_name = "${root_out_dir}/clang_x64/chromedriver"
+
+  deps = [
+    "//chrome/test/chromedriver:chromedriver($host_toolchain)",
+  ]
+  script = "//build/gn_run_binary.py"
+  sources = [
+    "//buildtools/third_party/eu-strip/bin/eu-strip",
+    prog_name,
+  ]
+  outputs = [
+    _stripped_chromedriver_file,
+  ]
+  args = [
+    rebase_path("//buildtools/third_party/eu-strip/bin/eu-strip",
+                root_build_dir),
+    "-o",
+    rebase_path(_stripped_chromedriver_file, root_build_dir),
+    rebase_path(prog_name, root_build_dir),
+  ]
+
+  visibility = [ ":*" ]
+}
+
+cipd_archive("chromedriver") {
+  cipd_manifest_name = "chromedriver.yaml"
+  cipd_path = "chromium/fuchsia/chromedriver-\${os}-\${arch}"
+  cipd_description = "Prebuilt Chromedriver binary for Fuchsia host."
+
+  deps = [
+    ":strip_chromedriver_binary",
+  ]
+
+  sources = [
+    _stripped_chromedriver_file,
+  ]
+}
+
 cipd_archive("tests") {
   _manifest_path = "${target_gen_dir}/test_manifest.json"
   cipd_manifest_name = "tests.yaml"
@@ -234,6 +277,7 @@ group("cipd") {
   testonly = true
   deps = [
     ":castrunner",
+    ":chromedriver",
     ":clear_key_cdm",
     ":debug_symbols",
     ":http",