[bazel] Split zlib into core and compression utils.

This allows other Bazel projects to use their existing zlib import,
and only pull compression utils from Chromium's zlib.
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Change-Id: I1f88632dd07661312aa2aaf8716c1742c1f29c53
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3375479Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78551}

BUILD.bazel

@@ -3383,6 +3383,7 @@ v8_library(
         ":v8_libbase",
         "@com_googlesource_chromium_base_trace_event_common//:trace_event_common",
         "@com_googlesource_chromium_zlib//:zlib",
+        "@com_googlesource_chromium_zlib//:zlib_compression_utils",
     ],
 )
 

bazel/BUILD.zlib

@@ -36,12 +36,9 @@ cc_library(
         "zlib.h",
         "zutil.c",
         "zutil.h",
-        "google/compression_utils_portable.h",
-        "google/compression_utils_portable.cc",
     ],
     hdrs = [
         "zlib.h",
-        "google/compression_utils_portable.h",
     ],
     include_prefix = "third_party/zlib",
     defines = [
@@ -55,3 +52,18 @@ cc_library(
     }),
     visibility = ["//visibility:public"],
 )
+
+cc_library(
+    name = "zlib_compression_utils",
+    srcs = [
+        "google/compression_utils_portable.cc",
+    ],
+    hdrs = [
+        "google/compression_utils_portable.h",
+    ],
+    include_prefix = "third_party/zlib",
+    visibility = ["//visibility:public"],
+    deps = [
+        ":zlib",
+    ],
+)