ui: accessibility: remove -Wunused-function for Atk

ui/accessibility/BUILD.gn

Index: ui/accessibility/BUILD.gn
diff --git a/ui/accessibility/BUILD.gn b/ui/accessibility/BUILD.gn
index 9c679815c1bd8f4fca4dcf1979fd64ea05d5c825..3902322f243be1cd9f837ea89a46a1cc6673479b 100644
--- a/ui/accessibility/BUILD.gn
+++ b/ui/accessibility/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 import("//build/json_schema_api.gni")
 import("//testing/test.gni")
@@ -9,6 +10,32 @@ if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
+pkg_config("atk") {

[Dirk Pranke, 2015/07/08 19:33:05]

this and the above change probably need to be protected by if (use_x11) { ... },
no? Or possible if (is_linux), not sure what the right dependency is.

[brettw, 2015/07/08 20:11:17]

Yeah, looks like x11 is the correct condition.

[llandwerlin-old, 2015/07/08 20:21:07]

It was under the x11 condition in build/config/linux/BUILD.gn.
Will change

+  packages = [ "atk" ]
+  atk_lib_dir = exec_script(pkg_config_script,
+                            [
+                              "--libdir",
+                              "atk",
+                            ],
+                            "string")
+  defines = [ "ATK_LIB_DIR=\"$atk_lib_dir\"" ]
+}
+
+# gn orders flags on a target before flags from configs. The default config
+# adds -Wall, and these flags have to be after -Wall -- so they need to come
+# from a config and can't be on the target directly.
+config("atk_warnings") {
+  cflags = [
+    # glib uses the pre-c++11 typedef-as-static_assert hack.
+    "-Wno-unused-local-typedef",
+
+    # G_DEFINE_TYPE automatically generates a *get_instance_private
+    # inline function after glib 2.37. That's unused. Prevent to
+    # complain about it.
+    "-Wno-unused-function",
+  ]
+}
+
 component("accessibility") {
   sources = [
     "ax_node.cc",
@@ -61,8 +88,8 @@ component("accessibility") {
     ]
 
     configs += [
-      "//build/config/linux:atk",
-      "//build/config/linux:atk_warnings",
+      ":atk",
+      ":atk_warnings",
       "//build/config/linux:gconf",
       "//build/config/linux:glib",
     ]