Let sqlite use fdatasync() on Linux-based systems

third_party/sqlite/BUILD.gn

 # Copyright (c) 2013 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.
 
 config("sqlite_config") {
   include_dirs = [ "." ]
 }
 
 source_set("sqlite") {
   sources = [
@@ skipping 24 matching lines @@
   }
   if (is_posix) {
     defines += [
       # Allow xSleep() call on Unix to use usleep() rather than sleep(), so it
       # will have microsecond precision.  Should only affect contended databases
       # via the busy callback.  Browser profile databases are mostly exclusive,
       # but renderer databases may allow for contention.
       "HAVE_USLEEP=1",
     ]
   }
+  if (is_linux || is_android) {
+    defines += [
+      # Linux provides fdatasync(), a faster equivalent of fsync().
+      "fdatasync=fdatasync",
+    ]
+  }
 
   include_dirs = [ "amalgamation" ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   if (is_linux) {
     cflags += [
       # SQLite doesn"t believe in compiler warnings,
       # preferring testing.
@@ skipping 41 matching lines @@
 if (is_ios) {
   source_set("sqlite_regexp") {
     sources = [
       "src/ext/icu/icu.c",
     ]
     deps = [
       "//third_party/icu",
     ]
   }
 }