media: Enable ProtectedMediaIdentifierPermissionContext on ChromeOS.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 703 matching lines @@
     # Cross-platform Aura files.
     'chrome_browser_aura_sources': [
       # This file is called _views but has aura calls in it.
       'browser/download/drag_download_item_views.cc',
       'browser/lifetime/application_lifetime_aura.cc',
       'browser/platform_util_aura.cc',
     ],
     # ChromeOS-sources not ending in _chromeos (which would be included in
     # other sections and filtered out for non-ChromeOS platforms.
     'chrome_browser_chromeos_sources': [
+      'browser/media/protected_media_identifier_infobar_delegate.cc',
+      'browser/media/protected_media_identifier_infobar_delegate.h',
+      'browser/media/protected_media_identifier_permission_context.cc',
+      'browser/media/protected_media_identifier_permission_context.h',
+      'browser/media/protected_media_identifier_permission_context_factory.cc',
+      'browser/media/protected_media_identifier_permission_context_factory.h',
       'browser/metrics/chromeos_metrics_provider.cc',
       'browser/metrics/chromeos_metrics_provider.h',
       'browser/renderer_host/offline_resource_throttle.cc',
       'browser/renderer_host/offline_resource_throttle.h',
       # This is technically also dependent on enable_plugins but we don't
       # support ChromeOS with enable_plugins==0.
       'browser/renderer_host/pepper/pepper_platform_verification_message_filter.cc',
       'browser/renderer_host/pepper/pepper_platform_verification_message_filter.h',
     ],
     # Used everywhere but ChromeOS.
@@ skipping 2954 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }