Make unit_tests compile in Mac GN

chrome/common/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("//tools/grit/grit_rule.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 import("//chrome/version.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("../chrome_common.gypi") ],
@@ skipping 121 matching lines @@
                            ".",
                            "//chrome")
     public_deps += [
       "//device/usb",
       "//chrome/common/extensions/api",
       "//extensions/common",
       "//extensions/common/api",
       "//extensions:extensions_resources",
       "//extensions/strings",
       "//media/cast:net",
-
-      # This dependency is for a header used only by extensions code.
-      "//ui/keyboard:keyboard_with_content",
     ]
     if (is_chromeos) {
       sources +=
           rebase_path(gypi_values.chrome_common_extensions_chromeos_sources,
                       ".",
                       "//chrome")
     }
+    if (use_aura) {
+      # This dependency is for a header used only by extensions code.
+      public_deps += [ "//ui/keyboard:keyboard_with_content" ]
+    }
   }
 
   if (is_win || is_mac) {
     sources +=
         rebase_path(gypi_values.chrome_common_win_mac_sources, ".", "//chrome")
     public_deps += [ "//breakpad:client" ]
   }
   if (is_win || is_mac || is_chromeos) {
     sources += rebase_path(gypi_values.chrome_common_networking_private_sources,
                            ".",
@@ skipping 219 matching lines @@
     ":constants",
     "//base",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "resource_usage_reporter.mojom",
   ]
 }