Take #2 at re-enabling breakpad in the Mac GN build.

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 255 matching lines @@
       "//device/usb",
       "//third_party/pdfium/samples",
     ]
   }
 
   # 
   # TODO(GYP): Make everything below this work in the GN build.
   #
 
   if (is_mac) {
-    # TODO(dpranke): Need to fix the unused function errors in breakpad.
-    deps -= [
-      "//breakpad:symupload"
-    ]
-
     # TODO(dpranke): These need a webrtc fix in order to build.
     deps -= [
       "//jingle:notifier",
       "//third_party/libjingle",
       "//third_party/webrtc",
     ]
 
     # TODO(dpranke): These depend on Blink and need Blink fixes to build.
     deps -= [
       "//cc/blink",
@@ skipping 90 matching lines @@
       "//ui/native_theme",
       "//ui/snapshot",
       "//ui/surface",
       "//ui/views",
       "//ui/views/controls/webview",
       "//ui/web_dialogs",
       "//ui/wm",
     ]
   }
 }