Cronet iOS: Move crnet_consumer sample app to Cronet

ios/crnet/crnet_consumer/BUILD.gn

-# 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.
-
-import("//build/config/ios/rules.gni")
-
-ios_app_bundle("crnet_consumer") {
-  info_plist = "crnet-consumer-Info.plist"
-
-  deps = [
-    "//base",
-    "//ios/crnet:crnet_framework+link",
-
-    # All shared libraries must have the sanitizer deps to properly link in
-    # asan mode (this target will be empty in other cases).
-    "//build/config/sanitizers:deps",
-  ]
-
-  sources = [
-    "crnet_consumer_app_delegate.h",
-    "crnet_consumer_app_delegate.mm",
-    "crnet_consumer_view_controller.h",
-    "crnet_consumer_view_controller.m",
-    "main.mm",
-  ]
-
-  bundle_deps = [ "//ios/crnet:crnet_framework+bundle" ]
-
-  configs += [ "//build/config/compiler:enable_arc" ]
-}