MacViews: Remove constrained window dependencies for certificate viewer.

components/web_modal/BUILD.gn

Index: components/web_modal/BUILD.gn
diff --git a/components/web_modal/BUILD.gn b/components/web_modal/BUILD.gn
index a06653225d4a59a8b19c501cc194f33121813abc..68054ab8ceaf3560bfe88c367b1590a20961a87e 100644
--- a/components/web_modal/BUILD.gn
+++ b/components/web_modal/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("//build/config/ui.gni")
+
 assert(!is_android && !is_ios)
 
 static_library("web_modal") {
@@ -16,7 +18,6 @@ static_library("web_modal") {
     "web_contents_modal_dialog_manager_delegate.cc",
     "web_contents_modal_dialog_manager_delegate.h",
   ]
-
   deps = [
     "//base",
     "//content/public/browser",