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

build/config/android/internal_rules.gni

 # 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/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/zip.gni")
 import("//third_party/ijar/ijar.gni")
 
 assert(is_android)
@@ skipping 36 matching lines @@
                suppressions_file,
                android_manifest,
                jar_path,
              ] + java_files
 
     outputs = [
       config_path,
       result_path,
     ]
 
+    if (!defined(deps)) {

[agrieve, 2016/03/19 00:12:54]

nit: you can save a couple lines if you put "deps = []" before
foward_variables_from.

[jbudorick, 2016/03/19 00:57:42]

Done.

+      deps = []
+    }
+    deps += [ "//build/android:prepare_lint_cache" ]
+
     rebased_java_files = rebase_path(java_files, root_build_dir)
 
     args = [
       "--lint-path=$rebased_android_sdk_root/tools/lint",
       "--config-path",
       rebase_path(suppressions_file, root_build_dir),
       "--manifest-path",
       rebase_path(android_manifest, root_build_dir),
       "--product-dir=.",
       "--jar-path",
@@ skipping 2100 matching lines @@
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--script-output-path",
       rebase_path(generated_script, root_build_dir),
     ]
     args += test_runner_args
   }
 }