Create toplevel mandoline directory.

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 45 matching lines @@
     "//content/test:content_unittests",
     "//crypto:crypto_unittests",
     "//device:device_unittests",
     "//extensions:extensions_browsertests",
     "//extensions:extensions_unittests",
     "//google_apis/gcm:gcm_unit_tests",
     "//gpu:gpu_unittests",
     "//ipc:ipc_tests",
     "//ipc/mojo:ipc_mojo_unittests",
     "//jingle:jingle_unittests",
+    "//mandoline",
     "//media:media_unittests",
     "//media/cast:cast_unittests",
     "//mojo",
     "//mojo/application",
     "//mojo/common:mojo_common_unittests",
     "//net:hpack_example_generator",
     "//net:hpack_fuzz_mutator",
     "//net:hpack_fuzz_wrapper",
     "//net:net_perftests",
     "//net:net_unittests",
@@ skipping 705 matching lines @@
 
       # Note:
       # (*) Fails but failures match GYP build at time of testing.
     ]
 
     if (enable_nacl) {
       deps += [ "//components/nacl:nacl_loader_unittests" ]  # PASSES 3/28/2015
     }
   }
 }