[ios] Adds ChromiumBrowserProvider.

ios/chrome/browser/providers/BUILD.gn

Index: ios/chrome/browser/providers/BUILD.gn
diff --git a/ios/chrome/browser/providers/BUILD.gn b/ios/chrome/browser/providers/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..ea55c5688545e47e3ea975ac835aa8f82f6ab9cc
--- /dev/null
+++ b/ios/chrome/browser/providers/BUILD.gn
@@ -0,0 +1,21 @@
+# 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("//ios/public/provider/chrome/browser/build_config.gni")
+
+source_set("providers") {
+  sources = [
+    "chromium_browser_provider.h",
+    "chromium_browser_provider.mm",
+    "chromium_logo_controller.h",
+    "chromium_logo_controller.mm",
+    "chromium_voice_search_provider.h",
+    "chromium_voice_search_provider.mm",
+  ]
+  deps = [
+    "//base",
+    "//ios/public/provider/chrome/browser",
+  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
+}