Android: Add owners for errorprone

Update README for errorprone and add owners. Use a single jar to make
maintenance easier and to pave the way to updates in the future.

BUG=383646

Change-Id: Ib9e2900141baab73515c957bb274b7568ef3102a
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet
Reviewed-on: https://chromium-review.googlesource.com/700856
Commit-Queue: Peter Wen <wnwen@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506526}

DEPS

@@ -286,7 +286,7 @@ deps = {
   },
 
   'src/third_party/errorprone/lib': {
-      'url': Var('chromium_git') + '/chromium/third_party/errorprone.git' + '@' + '0eea83b66343133b9c76b7d3288c30321818ebcf',
+      'url': Var('chromium_git') + '/chromium/third_party/errorprone.git' + '@' + '0f2d079e6ae4be0880bae71952a8b7203767724f',
       'condition': 'checkout_android',
   },
 

third_party/errorprone/BUILD.gn

@@ -4,40 +4,7 @@
 
 import("//build/config/android/rules.gni")
 
-java_prebuilt("error_prone_annotation_java") {
-  jar_path = "lib/error_prone_annotation-2.0.5.jar"
-}
-
-java_prebuilt("error_prone_annotations_java") {
-  jar_path = "lib/error_prone_annotations-2.0.5.jar"
-}
-
-java_prebuilt("javac_java") {
-  output_name = "javac_java"
-  jar_path = "lib/javac-1.9.0-dev-r2644-1.jar"
-}
-
-java_prebuilt("dataflow_java") {
-  jar_path = "lib/dataflow-1.8.10.jar"
-}
-
-java_prebuilt("javacutil_java") {
-  jar_path = "lib/javacutil-1.8.10.jar"
-}
-
 java_prebuilt("chromium_errorprone") {
-  jar_path = "lib/error_prone_core-2.0.5.jar"
-  deps = [
-    ":dataflow_java",
-    ":error_prone_annotation_java",
-    ":error_prone_annotations_java",
-    ":javac_java",
-    ":javacutil_java",
-    "//third_party/findbugs:format_string_java",
-  ]
+  jar_path = "lib/error_prone_ant-2.0.5.jar"
   main_class = "com.google.errorprone.ErrorProneCompiler"
-
-  # TODO(mikecase): Remove this extra arg when the bots are on jdk8 or higher.
-  bootclasspath =
-      "$root_build_dir/lib.java/third_party/errorprone/javac_java.jar"
 }

third_party/errorprone/OWNERS

+agrieve@chromium.org
 jbudorick@chromium.org
-mikecase@chromium.org
+wnwen@chromium.org

third_party/errorprone/README.chromium

@@ -2,15 +2,20 @@ Name: Error Prone
 Short Name: errorprone
 URL: http://errorprone.info/
 Version: 2.0.5
-Date: September 22, 2015
+Date: October 4, 2017
 License: Apache 2.0
 License File: LICENSE
 Security Critical: no
 
 Description:
-Catch common Java mistakes as compile-time errors
+* Catch common Java mistakes as compile-time errors.
+* Download a version of error_prone_ant from the maven repository:
+  * https://repo1.maven.org/maven2/com/google/errorprone/error_prone_ant/
+* Add jar file to the lib/ subdirectory, commit, update BUILD.gn and DEPS.
+* Remember to ensure that cronet still compiles using the following bots:
+  * master.tryserver.chromium.android:android_cronet_tester
+  * master.tryserver.chromium.mac:ios-simulator-cronet
 
 Local Modifications:
-No changes to the original source
-Added gn and gyp files
-Use javac jar from https://github.com/google/error-prone-javac when building.
+* No changes to the original source.
+* Add BUILD.gn.
\ No newline at end of file