Add src/extensions to All target in gyp

build/all.gyp

 # 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.
 
 {
   'variables': {
     # A hook that can be overridden in other repositories to add additional
     # compilation targets to 'All'.
     'app_targets%': [],
     # For Android-specific targets.
@@ skipping 95 matching lines @@
           ],
         }],
         ['OS!="ios" and OS!="android" and chromecast==0', {
           'dependencies': [
             '../third_party/re2/re2.gyp:re2',
             '../chrome/chrome.gyp:*',
             '../chrome/tools/profile_reset/jtl_compiler.gyp:*',
             '../cc/blink/cc_blink_tests.gyp:*',
             '../cc/cc_tests.gyp:*',
             '../device/usb/usb.gyp:*',
+            '../extensions/extensions.gyp:*',
+            '../extensions/extensions_tests.gyp:*',
             '../gin/gin.gyp:*',
             '../gpu/gpu.gyp:*',
             '../gpu/tools/tools.gyp:*',
             '../ipc/ipc.gyp:*',
             '../ipc/mojo/ipc_mojo.gyp:*',
             '../jingle/jingle.gyp:*',
             '../media/cast/cast.gyp:*',
             '../media/media.gyp:*',
             '../mojo/mojo.gyp:*',
             '../mojo/mojo_base.gyp:*',
@@ skipping 1246 matching lines @@
           'dependencies': [
             '../ui/views/examples/examples.gyp:views_examples_with_content_exe',
             '../ui/views/views.gyp:views',
             '../ui/views/views.gyp:views_unittests',
           ],
         },  # target_name: macviews_builder
       ],  # targets
     }],  # os=='mac' and toolkit_views==1
   ],  # conditions
 }