Make unit_test compile on Android & GN part 1/2

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 2259 matching lines @@
           ],
           # Bundle all the necessary resources into the test bundle.
           'includes': ['chrome_ios_bundle_resources.gypi'],
           'xcode_settings': {'OTHER_LDFLAGS': ['-ObjC']},
         }],
         ['OS=="android"', {
           'sources': [ '<@(chrome_unit_tests_offline_pages_sources)' ],
           'dependencies!': [
             '../third_party/libaddressinput/libaddressinput.gyp:libaddressinput',
           ],
-          'sources!': [
-            'common/spellcheck_common_unittest.cc',
-            'renderer/spellchecker/spellcheck_multilingual_unittest.cc',
-            'renderer/spellchecker/spellcheck_provider_hunspell_unittest.cc',
-            'renderer/spellchecker/spellcheck_unittest.cc',
-          ],
           'ldflags': [
             # Some android targets still depend on --gc-sections to link.
             # TODO: remove --gc-sections for Debug builds (crbug.com/159847).
             '-Wl,--gc-sections',
           ],
           'dependencies': [
             '../testing/android/native_test.gyp:native_test_native_code',
           ],
         }, {  # Not Android.
           'sources': [ '<@(chrome_unit_tests_non_android_sources)' ],
@@ skipping 11 matching lines @@
         }],
         ['enable_background==1', {
           'sources': [ '<@(chrome_unit_tests_background_sources)' ],
         }],
         ['enable_spellcheck==1', {
           'sources': [ '<@(chrome_unit_tests_spellchecker_sources)' ],
           'conditions': [
             ['OS!="mac" and OS!="ios"', {
               'dependencies': [ '../third_party/hunspell/hunspell.gyp:hunspell' ],
             }],
+            ['OS=="android"', {
+              'sources!': [
+                'common/spellcheck_common_unittest.cc',
+                'renderer/spellchecker/spellcheck_multilingual_unittest.cc',
+                'renderer/spellchecker/spellcheck_provider_hunspell_unittest.cc',
+                'renderer/spellchecker/spellcheck_unittest.cc',
+              ],
+            }]
           ],
         }],
         ['enable_one_click_signin==1', {
           'sources': [
             'browser/ui/sync/one_click_signin_sync_observer_unittest.cc',
             'browser/ui/sync/one_click_signin_sync_starter_unittest.cc',
           ],
         }],
         ['enable_extensions==1', {
           'sources': [ '<@(chrome_unit_tests_extensions_sources)' ],
@@ skipping 645 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }