Split //ios/chrome/browser in multiple targets.

ios/chrome/browser/ui/webui/net_export/BUILD.gn

Index: ios/chrome/browser/ui/webui/net_export/BUILD.gn
diff --git a/ios/chrome/browser/ui/webui/net_export/BUILD.gn b/ios/chrome/browser/ui/webui/net_export/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..c35468e37d2c47e88090091868f716524e73bd5a
--- /dev/null
+++ b/ios/chrome/browser/ui/webui/net_export/BUILD.gn
@@ -0,0 +1,20 @@
+# 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.
+
+source_set("net_export") {
+  sources = [
+    "net_export_ui.cc",
+    "net_export_ui.h",
+  ]
+  deps = [
+    "//base",
+    "//components/net_log",
+    "//components/resources",
+    "//ios/chrome/app/strings",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/ui",
+    "//ios/web",
+  ]
+}