ozone gbm: whitelist 3 DRM ioctl code for native GpuMemoryBuffer.

content/common/BUILD.gn

Index: content/common/BUILD.gn
diff --git a/content/common/BUILD.gn b/content/common/BUILD.gn
index 17113e25a06a8099d7765d9d69f7964705dd648d..2d0350f8e56de3f6d3e064a0f8920c302fcefed8 100644
--- a/content/common/BUILD.gn
+++ b/content/common/BUILD.gn
@@ -6,6 +6,8 @@ import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/common/common.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
+import("//ui/ozone/ozone.gni")

[brettw, 2015/08/24 21:53:38]

A better way to do this would be to add a config
//ui/ozone:vgem_map

and defines USE_VGEM_MAP or not depending on the value of the flag. That way you
don't need to import this file and logic about these defines isn't duplicated.

[dshwang, 2015/08/26 14:18:02]

AFAIK, there is no way to inherit DEFINE value from dependencies.

[brettw, 2015/08/26 22:27:49]

In ui/ozone/BUILD.gn:
  config("vgem_map") {
    if (use_vgem_map) {
      defines = [ "USE_VGEM_MAP" ]
    }
  }

and in the targets you want to define this define in:
  configs += [ "//ui/ozone:vgem_map" ]
in all cases.

Now the conditional logic and define value is in one place.

[dshwang, 2015/08/27 12:47:09]

Oh, there is a way. Thank you for explaining!

Now define USE_VGEM_MAP only once in both gn and gyp

+
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
 }
@@ -463,6 +465,10 @@ source_set("common") {
 
   if (use_seccomp_bpf) {
     defines += [ "USE_SECCOMP_BPF" ]
+
+    if (use_vgem_map) {
+      defines += [ "USE_VGEM_MAP" ]
+    }
   } else {
     if (is_linux) {
       sources -= [