Add protoc javalite plugin to third_party/

New versions of protoc require a java lite plugin to generate lite
protos. That will be added to the checkout inside
third_party/protoc_javalite using cipd.

Bug: 782237
Change-Id: I808b0acc14832c80e5efc4baacffb3323bc98653
Reviewed-on: https://chromium-review.googlesource.com/c/1338207
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Grace Kloba <klobag@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Oliver Chang <ochang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610975}

DEPS

@@ -1026,6 +1026,17 @@ deps = {
       'dep_type': 'cipd',
   },
 
+  'src/third_party/protoc_javalite': {
+      'packages': [
+          {
+              'package': 'chromium/third_party/protoc_javalite',
+              'version': 'version:3.0.0-cr1',
+          },
+      ],
+      'condition': 'checkout_android',
+      'dep_type': 'cipd',
+  },
+
   # Dependency of chromite.git and skia.
   'src/third_party/pyelftools': {
       'url': Var('chromium_git') + '/chromiumos/third_party/pyelftools.git' + '@' + '19b3e610c86fcadb837d252c794cb5e8008826ae',

third_party/.gitignore

@@ -173,6 +173,7 @@
 /perl
 /ppapi
 /proguard/lib/
+/protoc_javalite/protoc-gen-javalite
 /psyco_win32
 /pthreads-win32
 /py_trace_event/src

third_party/protoc_javalite/OWNERS

+mheikal@chromium.org
+jkrcal@chromium.org

third_party/protoc_javalite/README.chromium

+Name: protoc Java Lite Runtime plugin
+Short Name: protoc-gen-javalite
+URL: https://repo1.maven.org/maven2/com/google/protobuf/protoc-gen-javalite/${Version}/protoc-gen-javalite-${Version}-linux-x86_32.exe
+Version: 3.0.0
+License: BSD
+License File: NOT_SHIPPED
+Security Critical: No
+Description:
+This is the protoc plugin for java lite runtime. This is required to compile
+lite java protos to be used on Android. This is distributed using maven however
+it is a compiled executable that needs to be manually downloaded and renamed.
+
+Local Modifications:
+No modifications except the name of the executable has to be
+"protoc-gen-javalite".

third_party/protoc_javalite/cipd.yaml

+# Copyright 2018 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.
+
+# To create CIPD package run the following command.
+# cipd create --pkg-def cipd.yaml -tag version:3.0.0-cr1
+# (note: -cr1 is only because -cr0 had a bad directory structure; no actual
+# modifications performed.)
+package: chromium/third_party/protoc_javalite
+description: protoc plugin for java lite runtime
+data:
+  - file: protoc-gen-javalite