Android: Do not build files not needed on the platform.

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 21687772cbfb1b037dc41a4a260646e5a961727c..b54d3c15e46c871fc72723418ea07fd5a2bcb938 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -202,8 +202,6 @@
       'browser/resources_util_unittest.cc',
       'browser/search/contextual_search_policy_handler_android_unittest.cc',
       'browser/search/iframe_source_unittest.cc',
-      'browser/search/instant_unittest_base.cc',
-      'browser/search/instant_unittest_base.h',
       'browser/search/thumbnail_source_unittest.cc',
       'browser/search_engines/search_provider_install_data_unittest.cc',
       'browser/service_process/service_process_control_mac_unittest.mm',
@@ -1505,6 +1503,8 @@
       'browser/profile_resetter/triggered_profile_resetter_win_unittest.cc',
       'browser/renderer_context_menu/render_view_context_menu_unittest.cc',
       'browser/search/instant_service_unittest.cc',
+      'browser/search/instant_unittest_base.cc',
+      'browser/search/instant_unittest_base.h',
       'browser/search/search_unittest.cc',
       # GCMDriverAndroid is not yet implemented.
       'browser/services/gcm/gcm_profile_service_unittest.cc',
@@ -1891,6 +1891,25 @@
             ['include', '^test/base/testing_browser_process'],
           ],
         }],
+        ['OS=="android"', {
+          'sources!': [
+            'browser/sessions/session_service_test_helper.cc',
+            'browser/sessions/session_service_test_helper.h',
+            'browser/ui/exclusive_access/fullscreen_controller_state_test.cc',
+            'browser/ui/exclusive_access/fullscreen_controller_state_test.h',
+            'browser/ui/exclusive_access/fullscreen_controller_state_tests.h',
+            'browser/ui/exclusive_access/fullscreen_controller_test.cc',
+            'browser/ui/exclusive_access/fullscreen_controller_test.h',
+            'browser/ui/webui/signin/login_ui_test_utils.cc',
+            'browser/ui/webui/signin/login_ui_test_utils.h',
+            'test/base/dialog_test_browser_window.cc',
+            'test/base/dialog_test_browser_window.h',
+            'test/base/in_process_browser_test.cc',
+            'test/base/in_process_browser_test.h',
+            'test/base/test_browser_window.cc',
+            'test/base/test_browser_window.h',
+          ],
+        }],
         ['chromeos==1', {
           'dependencies': [
             '../build/linux/system.gyp:dbus',