Remove CRWNetworkActivityIndicatorManager.

ios/chrome/browser/ui/BUILD.gn

Index: ios/chrome/browser/ui/BUILD.gn
diff --git a/ios/chrome/browser/ui/BUILD.gn b/ios/chrome/browser/ui/BUILD.gn
index d68a845296232b73fa531b16d1519027b544df69..0a784115760338c70af8fd4b73276333f402b8c4 100644
--- a/ios/chrome/browser/ui/BUILD.gn
+++ b/ios/chrome/browser/ui/BUILD.gn
@@ -4,6 +4,17 @@
 
 import("//build/config/ios/rules.gni")
 
+source_set("ui_arc") {
+  sources = [
+    "network_activity_indicator_manager.h",
+    "network_activity_indicator_manager.mm",
+  ]
+  deps = [
+    "//base",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+}
+
 source_set("ui") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
@@ -23,8 +34,6 @@ source_set("ui") {
     "image_util.mm",
     "native_content_controller.h",
     "native_content_controller.mm",
-    "network_activity_indicator_manager.h",
-    "network_activity_indicator_manager.mm",
     "orientation_limiting_navigation_controller.h",
     "orientation_limiting_navigation_controller.mm",
     "prerender_final_status.h",
@@ -55,7 +64,13 @@ source_set("ui") {
     "//ui/base",
     "//ui/gfx",
   ]
-  allow_circular_includes_from = [ "//ios/chrome/browser/ui/commands" ]
+  public_deps = [
+    ":ui_arc",
+  ]
+  allow_circular_includes_from = [
+    ":ui_arc",
+    "//ios/chrome/browser/ui/commands",
+  ]
   libs = [
     "Accelerate.framework",
     "CoreGraphics.framework",