[Android] Run lint using a cache in the output directory.

build/android/BUILD.gn

 # 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.
 
 import("//build/config/android/rules.gni")
 import("//third_party/ijar/ijar.gni")
 
 sun_tools_jar_path = "$root_gen_dir/sun_tools_jar/tools.jar"
 
+# Create or update the API versions cache if necessary by running a
+# functionally empty lint task. This prevents racy creation of the
+# cache while linting java targets in android_lint.
+action("prepare_android_lint_cache") {
+  _cache_dir = "${root_out_dir}/android_lint_cache"
+  depfile = "${_cache_dir}/prepare_android_lint_cache.d"
+  _manifest_file = "//build/android/AndroidManifest.xml"
+  _result_file = "${_cache_dir}/result.xml"
+  script = "//build/android/gyp/lint.py"
+
+  inputs = [
+    "${android_sdk_root}/platform-tools/api/api-versions.xml",
+  ]
+  outputs = [
+    depfile,
+  ]
+  args = [
+    "--build-tools-version",
+    android_sdk_build_tools_version,
+    "--cache-dir",
+    rebase_path(_cache_dir, root_build_dir),
+    "--depfile",
+    rebase_path(depfile, root_build_dir),
+    "--lint-path",
+    "$rebased_android_sdk_root/tools/lint",
+    "--manifest-path",
+    rebase_path(_manifest_file, root_build_dir),
+    "--product-dir",
+    ".",
+    "--result-path",
+    rebase_path(_result_file, root_build_dir),
+    "--silent",
+    "--enable",
+  ]
+}
+
 action("find_sun_tools_jar") {
   script = "//build/android/gyp/find_sun_tools_jar.py"
   depfile = "$target_gen_dir/$target_name.d"
   outputs = [
     depfile,
     sun_tools_jar_path,
   ]
   args = [
     "--depfile",
     rebase_path(depfile, root_build_dir),
@@ skipping 103 matching lines @@
   _target_name = get_path_info(script, "name") + "_wrapper"
   _wrapper_targets += [ ":$_target_name" ]
   wrapper_script(_target_name) {
     target = script
   }
 }
 
 group("wrapper_scripts") {
   deps = _wrapper_targets
 }