Exclude ppapi_tests dep when enable_plugins=0.

content/content_tests.gypi

 # Copyright (c) 2013 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': [
     {
       'target_name': 'layouttest_support_content',
       'type': 'static_library',
       'conditions': [
@@ skipping 1275 matching lines @@
               'sources/': [
                 ['exclude', '^renderer/pepper/'],
               ],
               'sources!': [
                 'browser/plugin_service_impl_browsertest.cc',
                 'browser/plugin_data_remover_impl_browsertest.cc',
                 'test/ppapi/ppapi_browsertest.cc',
                 'test/ppapi/ppapi_test.cc',
                 'test/ppapi/ppapi_test.h',
               ],
+              'dependencies!': [
+                '../ppapi/ppapi_internal.gyp:ppapi_tests',
+              ]
             }],
             ['input_speech==0', {
               'sources/': [
                 ['exclude', '^browser/speech/'],
               ]
             }],
             ['branding=="Chrome"', {
               'sources!': [
                 # These tests depend on single process mode, which is disabled
                 # in official builds.
@@ skipping 516 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }