chrome://plugins Mojo-ification part 1/2, adding interface.

chrome/chrome_browser_ui.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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 2884 matching lines @@
         # crbug.com/422252
         '../build/android/disable_gcc_lto.gypi',
       ],
       'conditions': [
         ['OS != "ios"', {
           'sources': [
             '<@(chrome_browser_ui_non_ios_sources)',
             '<@(chrome_browser_ui_toolbar_model_sources)',
             '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/engagement/site_engagement.mojom.cc',
             '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/omnibox/omnibox.mojom.cc',
+            '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/plugins/plugins.mojom.cc',
           ],
           'dependencies': [
             'chrome_web_ui_mojo_bindings.gyp:web_ui_mojo_bindings',
             'common_net',
             'debugger',
             'installer_util',
             '../components/components.gyp:app_modal',
             '../components/components.gyp:autofill_content_risk_proto',
             '../components/components.gyp:crash_core_browser',
             '../components/components.gyp:flags_ui',
@@ skipping 418 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }