Make it possible to build cronet without icu.

components/cronet.gypi

 # Copyright 2014 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.
 
 {
   'conditions': [
     ['OS=="android"', {
       # TODO(mef): Consider moving all Cronet Android targets into separate
       # file. Also figure out what needs to be done for gn script.
       'targets': [
@@ skipping 71 matching lines @@
             '-fvisibility=hidden',
             '-fvisibility-inlines-hidden',
             '-Wno-sign-promo',
             '-Wno-missing-field-initializers',
           ],
           'ldflags': [
             '-llog',
             '-landroid',
             '-Wl,--gc-sections',
             '-Wl,--exclude-libs,ALL'
-          ]
+          ],
+          'conditions': [
+            [ 'use_icu_alternatives_on_android == 1', {
+                'dependencies!': [
+                  '../base/base.gyp:base_i18n',
+                  '../third_party/icu/icu.gyp:icui18n',
+                  '../third_party/icu/icu.gyp:icuuc',
+                ]
+              },
+            ],
+          ],
         },
         {
           'target_name': 'cronet',
           'type': 'none',
           'dependencies': [
             '../base/base.gyp:base',
             'libcronet',
             'cronet_url_request_error_list',
             'cronet_url_request_priority_list',
           ],
@@ skipping 83 matching lines @@
             'java_in_dir': 'cronet/android/sample/javatests',
             'resource_dir': 'cronet/android/sample/res',
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],
     }],  # OS=="android"
   ],
 }