GN updates to build base on iOS

base/process/BUILD.gn

Index: base/process/BUILD.gn
diff --git a/base/process/BUILD.gn b/base/process/BUILD.gn
index 814459b13e0381efb42d0974f65b8b0bf4bab58e..aac10836dd5ac877829379659638f53db4238f94 100644
--- a/base/process/BUILD.gn
+++ b/base/process/BUILD.gn
@@ -95,6 +95,22 @@ source_set("process") {
     ]
   }
 
+  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 = [