Bumped version of gRPC to 1.3.1

Change-Id: I7798476bd443a796e0e6a6e149ab8f66435ba4fa
diff --git a/incubator/grpc-dependencies/BUCK b/incubator/grpc-dependencies/BUCK
index 7179dc9..e36dc17 100644
--- a/incubator/grpc-dependencies/BUCK
+++ b/incubator/grpc-dependencies/BUCK
@@ -1,34 +1,34 @@
 include_defs('//bucklets/grpc.bucklet')
 
-fetch_grpc_plugin(version = '1.3.0')
+fetch_grpc_plugin(version = '1.3.1')
 
-# Repackaging of gRPC 1.3.0 to solve the OSGI split package issue.
+# Repackaging of gRPC 1.3.* to solve the OSGI split package issue.
 # If bumping the gRPC version, please write a new rule.
 
-def grpc_core_repkg_130():
+def grpc_core_repkg_131():
     repkg_deps = [
         '//lib:COMPILE',
         '//lib:google-instrumentation-0.3.0',
         "//lib:google-errorprone-2.0.19"
     ]
     remote_file(
-        name = "grpc-src-zip-130",
-        url = "https://github.com/grpc/grpc-java/archive/v1.3.0.zip",
-        sha1 = "aae4368c7e4c4666236238e31be3a529e153cc02",
+        name = "grpc-src-zip-131",
+        url = "https://github.com/grpc/grpc-java/archive/v1.3.1.zip",
+        sha1 = "03dc21440fdfa920aa0e905da17df35b0d6c9a44",
     )
     srcs = []
     for pkg in ['core', 'context']:
         name = 'grpc-' + pkg + '-130'
         genrule(
             name = name,
-            bash = 'jar xf $(location :grpc-src-zip-130) grpc-java-1.3.0/' + pkg + '/src/main/java '
-            + '&& cd grpc-java-1.3.0/' + pkg + '/src/main/java '
+            bash = 'jar xf $(location :grpc-src-zip-131) grpc-java-1.3.1/' + pkg + '/src/main/java '
+            + '&& cd grpc-java-1.3.1/' + pkg + '/src/main/java '
             + '&& jar -cf $OUT *',
             out = pkg + '.src.zip',
         )
         srcs.append(':' + name)
     osgi_jar(
-        name = 'grpc-core-repkg-1.3.0',
+        name = 'grpc-core-repkg-1.3.1',
         srcs = srcs,
         deps = repkg_deps,
         package_name_root = 'io.grpc',
@@ -38,4 +38,4 @@
         do_checkstyle = False,
     )
 
-grpc_core_repkg_130()
\ No newline at end of file
+grpc_core_repkg_131()