Mark some files/targets as compiled only when their associated feature is enabled.

chrome/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 
 # GYP version: chrome/chrome_resources.gyp:chrome_resources
 group("resources") {
   deps = [
     # Note: GYP lists some dependencies in addition to these actions. However,
@@ skipping 17 matching lines @@
     "//chrome/browser/resources:net_internals_resources",
     "//chrome/browser/resources:password_manager_internals_resources",
     "//chrome/browser/resources:signin_internals_resources",
     "//chrome/browser/resources:sync_internals_resources",
     "//chrome/browser/resources:translate_internals_resources",
   ]
   if (!is_ios) {
     deps += [
       "//chrome/browser/resources:component_extension_resources",
       "//chrome/browser/resources:options_resources",
-      "//chrome/browser/resources:quota_internals_resources",
-      "//chrome/browser/resources:sync_file_system_internals_resources",
     ]
   }
 
   if (enable_chromevox_next) {
     deps += [
       #'browser/resources/chromeos/chromevox2/chromevox.gyp:chromevox2',  TODO(GYP)
     ]
   } else {
     deps += [
       #'browser/resources/chromeos/chromevox/chromevox.gyp:chromevox',  TODO(GYP)
     ]
   }
+
+  if (enable_extensions) {
+    deps += [
+      "//chrome/browser/resources:quota_internals_resources",
+      "//chrome/browser/resources:sync_file_system_internals_resources",
+    ]
+  }
 }
 
 # GYP version: chrome/chrome_resources.gyp:chrome_strings
 group("strings") {
   deps = [
     "//chrome/app:chromium_strings",
     "//chrome/app:generated_resources",
     "//chrome/app:google_chrome_strings",
     "//chrome/app/resources:locale_settings",
   ]
 }