diff -up chromium-50.0.2661.11/build/linux/unbundle/icu.gyp.system-icu chromium-50.0.2661.11/build/linux/unbundle/icu.gyp
--- chromium-50.0.2661.11/build/linux/unbundle/icu.gyp.system-icu	2016-02-15 00:11:20.000000000 +0100
+++ chromium-50.0.2661.11/build/linux/unbundle/icu.gyp	2016-03-06 13:52:36.203741752 +0100
@@ -13,6 +13,7 @@
         ],
         'defines': [
           'U_USING_ICU_NAMESPACE=0',
+          'USING_SYSTEM_ICU',
         ],
       },
       'link_settings': {
@@ -34,6 +35,7 @@
         ],
         'defines': [
           'U_USING_ICU_NAMESPACE=0',
+          'USING_SYSTEM_ICU',
         ],
       },
       'link_settings': {
@@ -135,6 +137,7 @@
         ],
         'defines': [
           'U_USING_ICU_NAMESPACE=0',
+          'USING_SYSTEM_ICU',
         ],
       },
       'link_settings': {