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

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

Index: ios/chrome/browser/ui/webui/history/BUILD.gn
diff --git a/ios/chrome/browser/ui/webui/history/BUILD.gn b/ios/chrome/browser/ui/webui/history/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..258afaf14d5367526e0beb3876731a949be52118
--- /dev/null
+++ b/ios/chrome/browser/ui/webui/history/BUILD.gn
@@ -0,0 +1,51 @@
+# 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("history") {
+  sources = [
+    "browsing_history_handler.cc",
+    "browsing_history_handler.h",
+    "favicon_source.cc",
+    "favicon_source.h",
+    "history_ui.h",
+    "history_ui.mm",
+    "metrics_handler.cc",
+    "metrics_handler.h",
+  ]
+  deps = [
+    "//base",
+    "//base:i18n",
+    "//components/bookmarks/browser",
+    "//components/browser_sync",
+    "//components/browsing_data/core",
+    "//components/favicon/core",
+    "//components/favicon_base",
+    "//components/history/core/browser",
+    "//components/keyed_service/core",
+    "//components/prefs",
+    "//components/resources",
+    "//components/search",
+    "//components/signin/core/browser",
+    "//components/strings",
+    "//components/sync",
+    "//components/sync_sessions",
+    "//components/url_formatter",
+    "//ios/chrome/app/resources",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/bookmarks",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/favicon",
+    "//ios/chrome/browser/history",
+    "//ios/chrome/browser/signin",
+    "//ios/chrome/browser/signin",
+    "//ios/chrome/browser/sync",
+    "//ios/chrome/browser/ui",
+    "//ios/web",
+    "//net",
+    "//ui/base",
+    "//ui/gfx",
+    "//ui/resources",
+    "//url",
+  ]
+}