GN updates to build base on iOS

base/process/BUILD.gn

 # Copyright (c) 2015 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.
 
 source_set("process") {
   sources = [
     "internal_linux.cc",
     "internal_linux.h",
     "kill.cc",
     "kill.h",
@@ skipping 77 matching lines @@
       "memory.cc",
       "memory.h",
       "process_iterator.cc",
       "process_iterator.h",
       "process_metrics.cc",
       "process_metrics_posix.cc",
       "process_posix.cc",
     ]
   }
 
+  if (is_ios) {
+    sources -= [
+      "launch_posix.cc",
+      "process_metrics_posix.cc",
+    ]
+
+    set_sources_assignment_filter([])
+
+    sources += [
+      "process_handle_mac.cc",

[sdefresne, 2015/06/11 17:54:32]

I think we don't build those two files on iOS when using gyp:

$ ninja -C out/Debug-iphoneos -v -n base|grep process_iterator_mac
$ ninja -C out/Debug-iphoneos -v -n base|grep process_handle_mac

+      "process_iterator_mac.cc",
+    ]
+
+    set_sources_assignment_filter(sources_assignment_filter)
+  }
+
   configs += [ "//base:base_implementation" ]
 
   deps = [
     "//base/memory",
     "//base/third_party/dynamic_annotations",
   ]
 
   allow_circular_includes_from = [ "//base/memory" ]
 
   visibility = [ "//base/*" ]
 }