[MacViews] Implemented text context menu

ui/gfx/BUILD.gn

 # Copyright 2014 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("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 52 matching lines @@
     "color_space.cc",
     "color_space.h",
     "color_space_win.cc",
     "color_space_win.h",
     "color_transform.cc",
     "color_transform.h",
     "color_utils.cc",
     "color_utils.h",
     "decorated_text.cc",
     "decorated_text.h",
+    "decorated_text_mac.h",
+    "decorated_text_mac.mm",
     "favicon_size.cc",
     "favicon_size.h",
     "font.cc",
     "font.h",
     "font_fallback.h",
     "font_fallback_linux.cc",
     "font_fallback_linux.h",
     "font_fallback_mac.mm",
     "font_fallback_win.cc",
     "font_fallback_win.h",
@@ skipping 641 matching lines @@
 
 fuzzer_test("color_transform_fuzztest") {
   sources = [
     "color_transform_fuzzer.cc",
   ]
   deps = [
     ":gfx",
   ]
   libfuzzer_options = [ "max_len=1024" ]
 }