[Android] Incorporate findbugs into android builds.

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")
 
 assert(is_android)
 
 rebased_android_sdk = rebase_path(android_sdk, root_build_dir)
 rebased_android_sdk_root = rebase_path(android_sdk_root, root_build_dir)
@@ skipping 44 matching lines @@
       "--processed-config-path",
       rebase_path(config_path, root_build_dir),
       "--result-path",
       rebase_path(result_path, root_build_dir),
       "--java-files=$rebased_java_files",
       "--enable",
     ]
   }
 }
 
+template("findbugs") {
+  jar_path = invoker.jar_path
+
+  build_config = invoker.build_config
+
+  action(target_name) {
+    script = "//build/android/findbugs_diff.py"
+    depfile = "$target_gen_dir/$target_name.d"
+    result_path = "$target_gen_dir/$target_name/result.xml"
+    exclusions_file = "//build/android/findbugs_filter/findbugs_exclude.xml"
+
+    rebased_build_config = rebase_path(build_config, root_build_dir)
+
+    inputs = [
+      "//build/android/pylib/utils/findbugs.py",
+      exclusions_file,
+      jar_path,
+    ]
+
+    outputs = [
+      result_path,
+    ]
+
+    args = [
+      "--depfile",
+      rebase_path(depfile, root_build_dir),
+      "--auxclasspath-gyp",
+      "@FileArg($rebased_build_config:javac:classpath)",
+      "--output-file",
+      rebase_path(result_path, root_build_dir),
+      rebase_path(jar_path, root_build_dir),
+    ]
+  }
+}
+
 template("dex") {
   set_sources_assignment_filter([])
   if (defined(invoker.testonly)) {
     testonly = invoker.testonly
   }
 
   assert(defined(invoker.output))
   action(target_name) {
     script = "//build/android/gyp/dex.py"
     depfile = "$target_gen_dir/$target_name.d"
@@ skipping 1017 matching lines @@
     ]
     output = invoker.dex_path
     dex_arg_key = "${rebased_build_config}:final_dex:dependency_dex_files"
     args = [ "--inputs=@FileArg($dex_arg_key)" ]
     if (defined(invoker.excluded_jars)) {
       excluded_jars = rebase_path(invoker.excluded_jars, root_build_dir)
       args += [ "--excluded-paths=${excluded_jars}" ]
     }
   }
 }