Make it so net/ can be built without file:// support.

net/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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//tools/grit/grit_rule.gni")
 
 if (is_android) {
@@ skipping 19 matching lines @@
 # android devices, but we cannot be so sure about the variety of ARM devices.
 # So enable it for x86 only for now.
 posix_avoid_mmap = is_android && cpu_arch != "x86"
 
 # WebSockets and socket stream code are used everywhere except iOS.
 enable_websockets = !is_ios
 # TODO(brettw) put back to "!is_ios" when v8 is supported in GN build.
 use_v8_in_net = false  # TODO(brettw)!is_ios
 enable_built_in_dns = !is_ios
 
+enable_file_support = 1

[mef, 2014/05/06 15:21:30]

is there file support on ios?

[mmenke, 2014/05/06 18:13:06]

I'm not sure, but the file file:// code all appears to build and compile on iOS,
so I'm not sure if net/ should have that knowledge - I think it would make more
sense as part of a "recipe".

+
 enable_ftp_support = !is_ios
 
 config("net_config") {
   defines = []
   if (posix_avoid_mmap) {
     defines += [ "POSIX_AVOID_MMAP" ]
   }
 }
 
 # Disables Windows warning about size to int truncations.
@@ skipping 51 matching lines @@
   }
 
   if (is_posix) {
     if (posix_avoid_mmap) {
       sources -= [ "disk_cache/blockfile/mapped_file_posix.cc" ]
     } else {
       sources -= [ "disk_cache/blockfile/mapped_file_avoid_mmap_posix.cc" ]
     }
   }
 
+  if (!enable_file_support) {
+    sources -= [
+      'base/directory_lister.cc',
+      'base/directory_lister.h',
+      'url_request/url_request_file_dir_job.cc',
+      'url_request/url_request_file_dir_job.h',
+      'url_request/url_request_file_job.cc',
+      'url_request/url_request_file_job.h',
+      'url_request/file_protocol_handler.cc',
+      'url_request/file_protocol_handler.h',
+    ]
+  }
+
   if (!enable_ftp_support) {
     sources -= [
       "ftp/ftp_auth_cache.cc",
       "ftp/ftp_auth_cache.h",
       "ftp/ftp_ctrl_response_buffer.cc",
       "ftp/ftp_ctrl_response_buffer.h",
       "ftp/ftp_directory_listing_parser.cc",
       "ftp/ftp_directory_listing_parser.h",
       "ftp/ftp_directory_listing_parser_ls.cc",
       "ftp/ftp_directory_listing_parser_ls.h",
@@ skipping 793 matching lines @@
 
 if (is_android || is_linux) {
   executable("disk_cache_memory_test") {
     sources = [ "tools/disk_cache_memory_test/disk_cache_memory_test.cc" ]
     deps = [
       ":net",
       "//base",
     ]
   }
 }