DEPS: Update leveldatabase from 1.18 to 1.20.

third_party/leveldatabase/BUILD.gn

 # Copyright 2014 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.
 
 import("//testing/test.gni")
 
 defines = [ "LEVELDB_PLATFORM_CHROMIUM=1" ]
 
 config("leveldatabase_config") {
   include_dirs = [
     ".",
     "src",
     "src/include",
   ]
 }
 
+source_set("leveldatabase_opts.sse42") {
+  sources = [
+    "src/port/port_posix_sse.cc",
+  ]
+
+  configs += [ ":leveldatabase_config" ]
+
+  if (target_cpu == "x86" || target_cpu == "x64") {
+    defines += [ "LEVELDB_PLATFORM_POSIX_SSE" ]
+    if (!is_win || is_clang) {
+      cflags = [ "-msse4.2" ]
+    }
+  }
+}
+
 static_library("leveldatabase") {
   sources = [
     "env_chromium.cc",
     "env_chromium.h",
     "port/port_chromium.cc",
     "port/port_chromium.h",
     "src/db/builder.cc",
     "src/db/builder.h",
     "src/db/db_impl.cc",
     "src/db/db_impl.h",
@@ skipping 74 matching lines @@
     "src/util/random.h",
     "src/util/status.cc",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   public_configs = [ ":leveldatabase_config" ]
 
   deps = [
+    ":leveldatabase_opts.sse42",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//third_party/re2",
     "//third_party/snappy",
   ]
 
   if (is_win) {
     cflags = [ "/wd4018" ]  # Signed/unsigned mismatch in comparison.
 
     if (is_official_build) {
@@ skipping 60 matching lines @@
 
   test("leveldb_cache_test") {
     sources = [
       "src/util/cache_test.cc",
     ]
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     deps = [
       ":leveldb_testutil",
     ]
+
+    if (is_win) {
+      # util\cache_test.cc(167): warning C4018: '<': signed/unsigned mismatch

[cmumford, 2017/03/02 20:29:50]

Let's just fix the test. we'll be using leveldb v1.20+, but I think that's
better than disabling this warning.

If you don't want to miss M58 today then at least add a TODO.

[pwnall, 2017/03/02 20:41:52]

Done.
This flag is also used for most of leveldb's source code (see line 134 above),
so I suspect the fixes will be a bit involved.

+      # util\cache_test.cc(171): warning C4018: '<': signed/unsigned mismatch
+      cflags = [ "/wd4018" ]  # Signed/unsigned mismatch in comparison.
+    }
   }
 
   test("leveldb_corruption_test") {
     sources = [
       "src/db/corruption_test.cc",
     ]
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     deps = [
       ":leveldb_testutil",
@@ skipping 132 matching lines @@
     sources = [
       "src/db/write_batch_test.cc",
     ]
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     deps = [
       ":leveldb_testutil",
     ]
   }
 
-  test("leveldb_bench") {
-    sources = [
-      "src/db/db_bench.cc",
-    ]
-
-    configs -= [ "//build/config/compiler:chromium_code" ]
-    configs += [ "//build/config/compiler:no_chromium_code" ]
-
+  group("leveldb_test_targets") {
+    testonly = true
     deps = [
-      ":leveldb_testutil",
+      ":env_chromium_unittests",
+      ":leveldb_arena_test",
+      ":leveldb_bloom_test",
+      ":leveldb_cache_test",
+      ":leveldb_corruption_test",
+      ":leveldb_crc32c_test",
+      ":leveldb_db_bench",
+      ":leveldb_db_test",
+      ":leveldb_dbformat_test",
+      ":leveldb_env_test",
+      ":leveldb_filename_test",
+      ":leveldb_filter_block_test",
+      ":leveldb_log_test",
+      ":leveldb_skiplist_test",
+      ":leveldb_table_test",
+      ":leveldb_version_edit_test",
+      ":leveldb_write_batch_test",
     ]
   }
 }