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

ios/chrome/browser/net/BUILD.gn

Index: ios/chrome/browser/net/BUILD.gn
diff --git a/ios/chrome/browser/net/BUILD.gn b/ios/chrome/browser/net/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..7bac9ea7a97c8c19e09d804477e393700ec06adc
--- /dev/null
+++ b/ios/chrome/browser/net/BUILD.gn
@@ -0,0 +1,88 @@
+# 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") {
+  sources = [
+    "chrome_cookie_store_ios_client.h",
+    "chrome_cookie_store_ios_client.mm",
+    "connection_type_observer_bridge.h",
+    "connection_type_observer_bridge.mm",
+    "cookie_util.h",
+    "cookie_util.mm",
+    "crl_set_fetcher.cc",
+    "crl_set_fetcher.h",
+    "http_server_properties_manager_factory.cc",
+    "http_server_properties_manager_factory.h",
+    "image_fetcher.h",
+    "image_fetcher.mm",
+    "ios_chrome_http_user_agent_settings.h",
+    "ios_chrome_http_user_agent_settings.mm",
+    "ios_chrome_network_delegate.cc",
+    "ios_chrome_network_delegate.h",
+    "ios_chrome_url_request_context_getter.cc",
+    "ios_chrome_url_request_context_getter.h",
+    "metrics_network_client.h",
+    "metrics_network_client.mm",
+    "metrics_network_client_manager.h",
+    "metrics_network_client_manager.mm",
+    "net_types.h",
+    "proxy_service_factory.cc",
+    "proxy_service_factory.h",
+    "retryable_url_fetcher.h",
+    "retryable_url_fetcher.mm",
+  ]
+  deps = [
+    "//base",
+    "//components/component_updater",
+    "//components/content_settings/core/browser",
+    "//components/pref_registry",
+    "//components/prefs",
+    "//components/proxy_config",
+    "//components/update_client",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/browsing_data",
+    "//ios/chrome/browser/webp_transcode",
+    "//ios/net",
+    "//ios/web",
+    "//net",
+    "//net:extras",
+    "//url",
+  ]
+  allow_circular_includes_from = [
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/browser_state",
+  ]
+}
+
+source_set("test_support") {
+  testonly = true
+  sources = [
+    "mock_image_fetcher.h",
+    "mock_image_fetcher.mm",
+  ]
+  deps = [
+    ":net",
+    "//testing/gmock",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "cookie_util_unittest.mm",
+    "image_fetcher_unittest.mm",
+    "metrics_network_client_unittest.mm",
+    "retryable_url_fetcher_unittest.mm",
+  ]
+  deps = [
+    ":net",
+    "//base",
+    "//base/test:test_support",
+    "//ios/web:test_support",
+    "//net",
+    "//net:test_support",
+    "//testing/gtest",
+  ]
+}