Do not use bundles for the CDM on Mac.

chrome/chrome_dll_bundle.gypi

 # Copyright (c) 2012 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 file contains resources for the main Mac chromium bundle.
 {
   # The main browser executable's name is <(mac_product_name).
   # Certain things will get confused if two modules in the
   # executable share the same name, so append " Framework" to the
   # product_name used for the framework.  This will result in
@@ skipping 166 matching lines @@
       'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Internet Plug-Ins/PepperFlash',
       'files': [],
       'conditions': [
         ['branding == "Chrome"', {
           'files': [
             '<(PRODUCT_DIR)/PepperFlash/PepperFlashPlayer.plugin',
           ],
         }],
       ],
     },
-    # TODO(ddorwin): Include CDM files in the Mac bundle.
+    {
+      # This file is used by the component installer.
+      # It is not a complete plug-in on its own.
+      'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Internet Plug-Ins/',
+      'files': [],
+      'conditions': [
+        ['branding == "Chrome"', {
+          'files': [
+            '<(PRODUCT_DIR)/widevinecdmadapter.plugin',
+          ],
+        }],
+      ],
+    },
     {
       # Copy of resources used by tests.
       'destination': '<(PRODUCT_DIR)',
       'files': [
           '<(SHARED_INTERMEDIATE_DIR)/repack/resources.pak'
       ],
     },
     {
       # Copy of resources used by tests.
       'destination': '<(PRODUCT_DIR)/pseudo_locales',
@@ skipping 94 matching lines @@
     ['enable_webrtc==1 and libpeer_target_type!="static_library"', {
       'copies': [{
        'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Libraries',
        'files': [
           '<(PRODUCT_DIR)/libpeerconnection.so',
         ],
       }],
     }],
   ],  # conditions
 }