Use the Errorprone Compiler

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 397 matching lines @@
 
     'src/third_party/apache-mime4j':
      Var('chromium_git') + '/chromium/deps/apache-mime4j.git' + '@' + '28cb1108bff4b6cf0a2e86ff58b3d025934ebe3a',
 
     'src/third_party/appurify-python/src':
      Var('chromium_git') + '/external/github.com/appurify/appurify-python.git' + '@' + 'ee7abd5c5ae3106f72b2a0b9d2cb55094688e867',
 
     'src/third_party/cardboard-java/src':
      Var('chromium_git') + '/external/github.com/googlesamples/cardboard-java.git' + '@' + '08ad25a04f2801bd822c3f2cd28301b68d74aef6',
 
+    'src/third_party/errorprone/lib':
+      Var('chromium_git') + '/chromium/third_party/errorprone.git' + '@' + '6c66e56c0f9d750aef83190466df834f9d6af8ab',
+
     'src/third_party/findbugs':
      Var('chromium_git') + '/chromium/deps/findbugs.git' + '@' + '7f69fa78a6db6dc31866d09572a0e356e921bf12',
 
     'src/third_party/freetype-android/src':
      Var('chromium_git') + '/chromium/src/third_party/freetype2.git' + '@' + 'e186230678ee8e4ea4ac4797ece8125761e3225a',
 
    'src/third_party/elfutils/src':
      Var('chromium_git') + '/external/elfutils.git' + '@' + '249673729a7e5dbd5de4f3760bdcaa3d23d154d7',
 
     'src/third_party/httpcomponents-client':
@@ skipping 354 matching lines @@
     # migration completes (let's say Sep 1 2014).
     'name': 'check_git_config',
     'pattern': '.',
     'action': [
         'python',
         'src/tools/check_git_config.py',
         '--running-as-hook',
     ],
   },
 ]