Allow generation of a chromium outdirs when enable_extensions=false

extensions/browser/app_window/BUILD.gn

Index: extensions/browser/app_window/BUILD.gn
diff --git a/extensions/browser/app_window/BUILD.gn b/extensions/browser/app_window/BUILD.gn
index d903645c23152588ad03ebb755b09cb2987979e0..5e9fe284b090bffb70181ff02c2e97576005700b 100644
--- a/extensions/browser/app_window/BUILD.gn
+++ b/extensions/browser/app_window/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//extensions/features/features.gni")
+
 source_set("app_window") {
   sources = [
     "app_delegate.h",
@@ -29,7 +31,12 @@ source_set("app_window") {
 
   deps = [
     "//content/public/common",
-    "//extensions:extensions_browser_resources",
-    "//extensions/strings",
   ]
+
+  if (enable_extensions) {
+    deps += [
+      "//extensions:extensions_browser_resources",
+      "//extensions/strings",
+    ]
+  }
 }