Cleanup ios/web_view.

ios/web_view/BUILD.gn

Index: ios/web_view/BUILD.gn
diff --git a/ios/web_view/BUILD.gn b/ios/web_view/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..1755748783f025fd9447a2945e68dbeaa39c27f5
--- /dev/null
+++ b/ios/web_view/BUILD.gn
@@ -0,0 +1,14 @@
+# Copyright 2016 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.
+
+# Public target that should be used to depend on web_view. Only give access
+# to the web_view public headers while still linking with the implementation.
+group("web_view") {
+  public_deps = [
+    "//ios/web_view/public",
+  ]
+  deps = [
+    "//ios/web_view/internal",
+  ]
+}