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

net/BUILD.gn

Index: net/BUILD.gn
===================================================================
--- net/BUILD.gn	(revision 266235)
+++ net/BUILD.gn	(working copy)
@@ -37,6 +37,8 @@
 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") {
@@ -108,6 +110,19 @@
     }
   }
 
+  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",