Only build various flash/pnacl/ppapi code when they are enabled.

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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 2258 matching lines @@
             'browser/ui/autofill/mock_autofill_dialog_view_delegate.h',
             'browser/ui/autofill/test_autofill_credit_card_bubble.cc',
             'browser/ui/autofill/test_autofill_credit_card_bubble.h',
           ],
         }],
         ['enable_plugins==0', {
           'sources/': [
             ['exclude', '^browser/plugins/'],
           ],
           'sources!': [
+            'browser/component_updater/test/component_installers_unittest.cc',
             'browser/metrics/plugin_metrics_provider_unittest.cc',
+            'common/pepper_permission_util_unittest.cc',
           ],
         }],
         ['enable_printing!=1', {
           'sources/': [
             ['exclude', '^browser/printing/'],
             ['exclude', '^browser/ui/webui/print_preview/'],
             ['exclude', '^service/'],
           ],
           'sources!': [
             'browser/local_discovery/privet_http_unittest.cc',
@@ skipping 596 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }