Work in progress to make //ios/chrome/browser build again in GN.

ios/chrome/app/resources/BUILD.gn

Index: ios/chrome/app/resources/BUILD.gn
diff --git a/mash/wm/resources/BUILD.gn b/ios/chrome/app/resources/BUILD.gn
similarity index 58%
copy from mash/wm/resources/BUILD.gn
copy to ios/chrome/app/resources/BUILD.gn
index 86bd61717b78c74b2c1ce3d784a54317dcdf557a..4f61ad84e79b911e23d53db9639087394053bab1 100644
--- a/mash/wm/resources/BUILD.gn
+++ b/ios/chrome/app/resources/BUILD.gn
@@ -2,13 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/chrome_build.gni")
 import("//tools/grit/grit_rule.gni")
 
 grit("resources") {
-  source = "mash_wm_resources.grd"
+  source = "ios_resources.grd"
+  output_dir = "$root_gen_dir/ios/chrome"
+  use_qualified_include = true
   outputs = [
-    "grit/mash_wm_resources.h",
-    "mash_wm_resources_100_percent.pak",
-    "mash_wm_resources_200_percent.pak",
+    "grit/ios_resources.h",
   ]
 }