don't mix system and bundled ICU

extensions/extensions.gyp

 # Copyright 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.
 
 {
   'includes': [
     'extensions.gypi',
   ],
   'variables': {
     'chromium_code': 1,
@@ skipping 35 matching lines @@
         '../components/components.gyp:crx_file',
         '../components/components.gyp:url_matcher',
         '../content/content.gyp:content_common',
         '../crypto/crypto.gyp:crypto',
         '../device/bluetooth/bluetooth.gyp:device_bluetooth',
         # For Mojo generated headers for generated_api.cc.
         '../device/serial/serial.gyp:device_serial_mojo',
         '../device/usb/usb.gyp:device_usb',
         '../ipc/ipc.gyp:ipc',
         '../net/net.gyp:net',
+        '../third_party/icu/icu.gyp:icuuc',
         '../third_party/re2/re2.gyp:re2',
         '../ui/base/ui_base.gyp:ui_base',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         '../ui/gfx/ipc/gfx_ipc.gyp:gfx_ipc',
         '../url/url.gyp:url_lib',
         '../third_party/libxml/libxml.gyp:libxml',
         'common/api/api.gyp:extensions_api',
         'extensions_resources.gyp:extensions_resources',
         'extensions_strings.gyp:extensions_strings',
         'extensions_common_constants',
@@ skipping 242 matching lines @@
               '<(SHARED_INTERMEDIATE_DIR)/blink/devtools_resources.pak',
             ],
             'pak_output': '<(PRODUCT_DIR)/extensions_shell_and_test.pak',
           },
           'includes': [ '../build/repack_action.gypi' ],
         },
       ],
     },
   ]
 }