Use icudat*.dat file on Mac

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index d005e6e897f3888b292de0925941a3f5f4d425be..4a074d5616b714d764ea51907a7117819bb4fd59 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1318,6 +1318,9 @@
           }],
         ],
       }],  # os_posix==1 and OS!="mac" and OS!="ios"
+      ['OS=="mac"', {
+        'icu_use_data_file_flag%': 1,
+      }],  # os=="mac"
       ['OS=="ios"', {
         'disable_nacl%': 1,
         'enable_background%': 0,
@@ -2220,17 +2223,6 @@
       ['use_udev==1', {
         'defines': ['USE_UDEV'],
       }],
-      ['icu_use_data_file_flag==1', {
-        'defines': ['ICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE'],
-      }, { # else icu_use_data_file_flag !=1
-        'conditions': [
-          ['OS=="win"', {
-            'defines': ['ICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_SHARED'],
-          }, {
-            'defines': ['ICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_STATIC'],
-          }],
-        ],
-      }],
       ['fastbuild!=0', {
         'xcode_settings': {
           'GCC_GENERATE_DEBUGGING_SYMBOLS': 'NO',