Cleanup: Put more plugin code behind the ENABLE_PLUGINS ifdef.

content/content_common.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 685 matching lines @@
         'common/gpu/x_util.cc',
         'common/gpu/x_util.h',
       ],
     }],
     ['enable_plugins==1', {
       'dependencies': [
         '../ppapi/ppapi_internal.gyp:ppapi_shared',
       ],
     }, {  # enable_plugins == 0
       'sources!': [
+        'common/pepper_file_util.cc',
+        'common/pepper_file_util.h',
+        'common/pepper_messages.h',
         'common/pepper_plugin_list.cc',
         'common/pepper_plugin_list.h',
+        'common/pepper_renderer_instance_data.cc',
+        'common/pepper_renderer_instance_data.h',
+        'common/plugin_list.cc',
+        'common/plugin_list.h',
+        'common/plugin_list_posix.cc',
         'common/sandbox_util.cc',
+        'public/common/pepper_plugin_info.cc',
+        'public/common/pepper_plugin_info.h',
       ],
     }],
     ['OS=="android"', {
       'dependencies': [
         '../media/media.gyp:media',
       ],
       'sources': [
         'common/gpu/media/android_video_decode_accelerator.cc',
         'common/gpu/media/android_video_decode_accelerator.h',
       ],
@@ skipping 178 matching lines @@
       ],
       'sources': [
         'common/gpu/client/gpu_memory_buffer_impl_ozone.cc',
       ],
       'sources!': [
         'common/gpu/client/gpu_memory_buffer_impl_linux.cc',
       ],
     }],
   ],
 }