Suppress leveldb recursion warning on official builds

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 = [
@@ skipping 98 matching lines @@
 
   deps = [
     "//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) {
+      # Function recursive on all control paths, crbug.com/620018
+      cflags += [ "/wd4717" ]
+    }
   }
 }
 
 if (!is_android) {
   test("env_chromium_unittests") {
     sources = [
       "env_chromium_unittest.cc",
     ]
     deps = [
       ":leveldatabase",
@@ skipping 199 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",
     ]
   }
 }