components: Add Exosphere component.

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 79e212832a8eefd5ba59929395d8cc6e70136e2f..ba1448e6ff720b1bd4eaea3f60291b32c8dc8e1e 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -90,6 +90,8 @@ group("all_components") {
       "//components/devtools_discovery",
       "//components/devtools_http_handler",
       "//components/domain_reliability",
+      "//components/exo",
+      "//components/exo/wayland",
       "//components/favicon/core",
       "//components/favicon_base",
       "//components/feedback",
@@ -222,6 +224,14 @@ group("all_components") {
     if (is_chromeos && enable_arc) {
       deps += [ "//components/arc" ]
     }
+
+    if (!use_ash) {
+      deps -= [ "//components/exo" ]
+    }
+
+    if (!use_ash || !is_linux) {
+      deps -= [ "//components/exo/wayland" ]
+    }
   } else {
     deps += [
       "//components/autofill/ios/browser",