Remove net & url small, iOS ICU alternatives, unit tests.

tools/mb/mb_config.pyl

Index: tools/mb/mb_config.pyl
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 5d7b82e634a8920516d8139610379ca297088ea2..cc73337fdcd15df3b5e785e2952a486e08558a32 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -1686,9 +1686,11 @@
 
     'cronet': {
       'gn_args': ('disable_file_support=true disable_ftp_support=true '
-                  'enable_websockets=false'),
+                  'enable_websockets=false use_platform_icu_alternatives=true '
+                  'disable_brotli_filter=true'),
       'gyp_defines': ('disable_file_support=1 disable_ftp_support=1 '
-                      'enable_websockets=0'),
+                      'enable_websockets=0 use_platform_icu_alternatives=1 '
+                      'disable_brotli_filter=1'),
     },
 
     'crosscompile': {