Only build PepperVideoSource/DestinationHost when the webrtc is enabled.

content/content_renderer.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': [
     '../jingle/jingle.gyp:jingle_glue',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
     '../third_party/hyphen/hyphen.gyp:hyphen',
@@ skipping 205 matching lines @@
     'renderer/pepper/pepper_proxy_channel_delegate_impl.h',
     'renderer/pepper/pepper_truetype_font.h',
     'renderer/pepper/pepper_truetype_font_android.cc',
     'renderer/pepper/pepper_truetype_font_host.cc',
     'renderer/pepper/pepper_truetype_font_host.h',
     'renderer/pepper/pepper_truetype_font_linux.cc',
     'renderer/pepper/pepper_truetype_font_mac.mm',
     'renderer/pepper/pepper_truetype_font_win.cc',
     'renderer/pepper/pepper_video_capture_host.cc',
     'renderer/pepper/pepper_video_capture_host.h',
-    'renderer/pepper/pepper_video_destination_host.cc',
-    'renderer/pepper/pepper_video_destination_host.h',
-    'renderer/pepper/pepper_video_source_host.cc',
-    'renderer/pepper/pepper_video_source_host.h',
     'renderer/pepper/pepper_websocket_host.cc',
     'renderer/pepper/pepper_websocket_host.h',
     'renderer/pepper/renderer_ppapi_host_impl.cc',
     'renderer/pepper/renderer_ppapi_host_impl.h',
     'renderer/plugin_channel_host.cc',
     'renderer/plugin_channel_host.h',
     'renderer/browser_plugin/browser_plugin.cc',
     'renderer/browser_plugin/browser_plugin.h',
     'renderer/browser_plugin/browser_plugin_backing_store.h',
     'renderer/browser_plugin/browser_plugin_backing_store.cc',
@@ skipping 170 matching lines @@
         'renderer/p2p/ipc_network_manager.cc',
         'renderer/p2p/ipc_network_manager.h',
         'renderer/p2p/ipc_socket_factory.cc',
         'renderer/p2p/ipc_socket_factory.h',
         'renderer/p2p/port_allocator.cc',
         'renderer/p2p/port_allocator.h',
         'renderer/p2p/socket_client.cc',
         'renderer/p2p/socket_client.h',
         'renderer/p2p/socket_dispatcher.cc',
         'renderer/p2p/socket_dispatcher.h',
+        'renderer/pepper/pepper_video_destination_host.cc',
+        'renderer/pepper/pepper_video_destination_host.h',
+        'renderer/pepper/pepper_video_source_host.cc',
+        'renderer/pepper/pepper_video_source_host.h',
       ],
     }],
     ['enable_plugins==1', {
       'dependencies': [
         '../ppapi/ppapi_internal.gyp:ppapi_host',
         '../ppapi/ppapi_internal.gyp:ppapi_proxy',
         '../ppapi/ppapi_internal.gyp:ppapi_shared',
       ],
     }, {  # enable_plugins==0
       'sources/': [
@@ skipping 18 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }