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

ios/chrome/browser/voice/BUILD.gn

 # Copyright 2015 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("voice") {
   sources = [
     "speech_input_locale.h",
     "speech_input_locale_config.h",
     "speech_input_locale_config.mm",
     "speech_input_locale_config_impl.h",
     "speech_input_locale_config_impl.mm",
     "speech_input_locale_match_config.h",
     "speech_input_locale_match_config.mm",
   ]
 
   deps = [
     "//components/pref_registry",
     "//components/prefs",
   ]
 
   public_deps = [
     "//base",
     "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/voice",
   ]
 }
 
 source_set("prefs") {
   sources = [
     "voice_search_prefs_registration.cc",
     "voice_search_prefs_registration.h",
   ]
 
   deps = [
     "//components/pref_registry",
     "//components/prefs",
-    "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/voice",
   ]
 }
 
 source_set("tts") {
   sources = [
     "text_to_speech_listener.h",
     "text_to_speech_listener.mm",
     "text_to_speech_parser.h",
     "text_to_speech_parser.mm",
     "voice_search_url_rewriter.h",
     "voice_search_url_rewriter.mm",
   ]
 
   deps = [
     ":voice",
     "//base",
     "//components/google/core/browser",
     "//components/prefs",
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state",
-    "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/voice",
     "//ios/web",
     "//net",
     "//third_party/google_toolbox_for_mac",
     "//url",
   ]
 }
 
 source_set("unit_tests") {
   configs += [ "//build/config/compiler:enable_arc" ]
   testonly = true
 
   sources = [
     "text_to_speech_listener_unittest.mm",
     "text_to_speech_parser_unittest.mm",
   ]
 
   deps = [
     "//base",
     "//ios/web",
     "//ios/web:test_support",
     "//testing/gtest",
     "//third_party/google_toolbox_for_mac",
   ]
 
   public_deps = [
     ":tts",
   ]
 }