Show a new placeholder for PDF's when plugins are disabled.

chrome/renderer/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//chrome/common/features.gni")
 import("//components/spellcheck/spellcheck_build_features.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
@@ skipping 176 matching lines @@
       "pepper/pepper_flash_renderer_host.cc",
       "pepper/pepper_flash_renderer_host.h",
       "pepper/pepper_helper.cc",
       "pepper/pepper_helper.h",
       "pepper/pepper_shared_memory_message_filter.cc",
       "pepper/pepper_shared_memory_message_filter.h",
       "pepper/pepper_uma_host.cc",
       "pepper/pepper_uma_host.h",
       "plugins/chrome_plugin_placeholder.cc",
       "plugins/chrome_plugin_placeholder.h",
+      "plugins/pdf_plugin_placeholder.cc",
+      "plugins/pdf_plugin_placeholder.h",
       "plugins/plugin_preroller.cc",
       "plugins/plugin_preroller.h",
       "plugins/power_saver_info.cc",
       "plugins/power_saver_info.h",
     ]
     deps += [
       "//components/pdf/renderer",
       "//components/strings",
       "//ppapi/host",
       "//ppapi/proxy",
@@ skipping 223 matching lines @@
     ]
   }
 
   if (is_android) {
     sources -= [
       "safe_browsing/mock_feature_extractor_clock.cc",
       "safe_browsing/mock_feature_extractor_clock.h",
     ]
   }
 }