Fix errors found in Mac gn component builds

ui/views/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("views.gyp") ],
@@ skipping 101 matching lines @@
         sources += gypi_values.views_desktop_aura_ozone_sources
       }
       if (is_linux) {
         sources += gypi_values.views_desktop_aura_linux_sources
       }
     }
   }
 
   if (is_mac) {
     deps += [ "//ui/accelerated_widget_mac" ]
+    libs = [
+      # Required by bridged_native_widget.mm.
+      "QuartzCore.framework",
+    ]
   }
 }
 
 static_library("test_support") {
   testonly = true
   sources = gypi_values.views_test_support_sources
 
   public_deps = [
     ":views",
   ]
@@ skipping 148 matching lines @@
       "//base/test:test_support",
       "//skia",
       "//testing/gtest",
       "//ui/compositor",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }