Split FaviconService and FaviconServiceImpl.

ios/chrome/browser/ui/history/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.
 
 source_set("history") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "clear_browsing_bar.h",
     "clear_browsing_bar.mm",
     "favicon_view.h",
@@ skipping 89 matching lines @@
     "history_search_view_controller_unittest.mm",
     "history_util_unittest.mm",
     "tab_history_popup_controller_unittest.mm",
   ]
   deps = [
     ":history",
     ":resources_unit_tests",
     "//base",
     "//base/test:test_support",
     "//components/favicon/core",
+    "//components/favicon/core/test:test_support",
     "//components/favicon_base",
     "//components/history/core/browser",
     "//components/keyed_service/core",
     "//components/sessions",
     "//components/strings",
     "//ios/chrome/app/strings",
     "//ios/chrome/browser",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/history",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/signin:test_support",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/collection_view",
     "//ios/chrome/browser/ui/util",
     "//ios/chrome/common",
     "//ios/chrome/test:test_support",
     "//ios/web",
     "//ios/web:test_support",
     "//skia",
+    "//testing/gmock",
     "//testing/gtest",
     "//third_party/ocmock",
     "//ui/base",
     "//ui/gfx",
     "//url",
   ]
 
   public_deps = [
     ":unit_tests_arc",
   ]
@@ skipping 84 matching lines @@
     "//ios/third_party/earl_grey",
     "//ios/web:test_support",
     "//net",
     "//ui/base",
   ]
   libs = [
     "UIKit.framework",
     "XCTest.framework",
   ]
 }