components: Add Exosphere component.

ash/BUILD.gn

Index: ash/BUILD.gn
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index deb32266b4b16cc593d2ec9479cd3c936d1224c1..067e045bcbb3210f503bca3b072b464b8d343dec 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -196,6 +196,10 @@ source_set("test_support") {
   if (is_win) {
     deps += [ "//ui/platform_window/win" ]
   }
+
+  if (is_chromeos) {
+    deps += [ "//ui/display" ]

[sky, 2015/11/18 21:01:21]

Is this specific to wayland? Just a fix that should have been there before?

[reveman, 2015/11/18 23:55:18]

Yes, this is just fixing a missing dependency, test_support sources use this.

I noticed this when trying to use //ash/test_support without an explicit
//ui/display dependency. Looks like this was not a problem in the past as all
components that depend on //ash/test_support use //ui/display directly..

+  }
 }
 
 source_set("test_support_with_content") {