Update rules_closure to latest version

This updates rules_closure to the version with Protobuf 3.7.1. The new
Protobuf version introduced dependency on zlib, that we also have to
add as transitive dependency.

Change-Id: Ic8fa455e86ed12dc3b7fe71ec2ba32ec00b043cd

WORKSPACE

@@ -14,9 +14,23 @@ http_archive(
 
 http_archive(
     name = "io_bazel_rules_closure",
-    sha256 = "ddce3b3a3909f99b28b25071c40b7fec7e2e1d1d1a4b2e933f3082aa99517105",
-    strip_prefix = "rules_closure-316e6133888bfc39fb860a4f1a31cfcbae485aef",
-    urls = ["https://github.com/bazelbuild/rules_closure/archive/316e6133888bfc39fb860a4f1a31cfcbae485aef.tar.gz"],
+    sha256 = "34abd9170fdbfdfc6f3b63f2c18cee3cbcb2ddbd5e3c97324add0aa7809ed875",
+    strip_prefix = "rules_closure-9d543facf886631e4ed379996e60ce3533188adc",
+    urls = ["https://github.com/bazelbuild/rules_closure/archive/9d543facf886631e4ed379996e60ce3533188adc.tar.gz"],
+)
+
+# Transitive dependency of rules_closure and protobuf
+http_archive(
+    name = "net_zlib",
+    build_file = "//:lib/zlib/BUILD",
+    sha256 = "c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1",
+    strip_prefix = "zlib-1.2.11",
+    urls = ["https://zlib.net/zlib-1.2.11.tar.gz"],
+)
+
+bind(
+    name = "zlib",
+    actual = "@net_zlib//:zlib",
 )
 
 # File is specific to Polymer and copied from the Closure Github -- should be

lib/zlib/BUILD

@@ -0,0 +1,60 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])  # BSD/MIT-like license (for zlib)
+
+_ZLIB_HEADERS = [
+    "crc32.h",
+    "deflate.h",
+    "gzguts.h",
+    "inffast.h",
+    "inffixed.h",
+    "inflate.h",
+    "inftrees.h",
+    "trees.h",
+    "zconf.h",
+    "zlib.h",
+    "zutil.h",
+]
+
+_ZLIB_PREFIXED_HEADERS = ["zlib/include/" + hdr for hdr in _ZLIB_HEADERS]
+
+# In order to limit the damage from the `includes` propagation
+# via `:zlib`, copy the public headers to a subdirectory and
+# expose those.
+genrule(
+    name = "copy_public_headers",
+    srcs = _ZLIB_HEADERS,
+    outs = _ZLIB_PREFIXED_HEADERS,
+    cmd = "cp $(SRCS) $(@D)/zlib/include/",
+    visibility = ["//visibility:private"],
+)
+
+cc_library(
+    name = "zlib",
+    srcs = [
+        "adler32.c",
+        "compress.c",
+        "crc32.c",
+        "deflate.c",
+        "gzclose.c",
+        "gzlib.c",
+        "gzread.c",
+        "gzwrite.c",
+        "infback.c",
+        "inffast.c",
+        "inflate.c",
+        "inftrees.c",
+        "trees.c",
+        "uncompr.c",
+        "zutil.c",
+        # Include the un-prefixed headers in srcs to work
+        # around the fact that zlib isn't consistent in its
+        # choice of <> or "" delimiter when including itself.
+    ] + _ZLIB_HEADERS,
+    hdrs = _ZLIB_PREFIXED_HEADERS,
+    copts = [
+        "-Wno-unused-variable",
+        "-Wno-implicit-function-declaration",
+    ],
+    includes = ["zlib/include/"],
+)