Fix remove_webcore_debug_symbols again to avoid constant building

third_party/WebKit/Source/controller/BUILD.gn

 # Copyright 2017 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/ui.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
@@ skipping 29 matching lines @@
 
   if (is_mac) {
     libs = [
       "AppKit.framework",
       "Foundation.framework",
     ]
   }
 
   if (remove_webcore_debug_symbols) {
     configs -= [ "//build/config/compiler:default_symbols" ]
-    configs += [ "//build/config/compiler:no_symbols" ]
+    configs += remove_webcore_symbols_config
   }
 }