Split //ios/public/provider/chrome/browser/* targets.

ios/chrome/browser/providers/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("//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/chrome/browser/providers/images",
     "//ios/chrome/browser/providers/signin",
     "//ios/chrome/browser/providers/ui",
     "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/distribution",
+    "//ios/public/provider/chrome/browser/signin",
+    "//ios/public/provider/chrome/browser/ui",
+    "//ios/public/provider/chrome/browser/user_feedback",
+    "//ios/public/provider/chrome/browser/voice",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }
 
 source_set("provider_factory") {
   sources = [
     "chromium_browser_provider_factory.mm",
   ]
   deps = [
     ":providers",
     "//base",
     "//ios/public/provider/chrome/browser",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }