GN: Make content and content_shell work when !enable_plugins

content/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("//build/config/ui.gni")
 import("//content/renderer/renderer.gni")
 
 source_set("renderer") {
   # Only targets in the content tree can depend directly on this target.
@@ skipping 146 matching lines @@
       ]
     }
   }
 
   if (enable_plugins && enable_webrtc) {
     sources += rebase_path(
         content_renderer_gypi_values.private_renderer_plugin_webrtc_sources,
         ".", "//content")
   }
 
+  if (!enable_pepper_cdms) {
+    sources -= [
+      "media/crypto/pepper_cdm_wrapper.h",
+      "media/crypto/pepper_cdm_wrapper_impl.cc",
+      "media/crypto/pepper_cdm_wrapper_impl.h",
+      "media/crypto/ppapi_decryptor.cc",
+      "media/crypto/ppapi_decryptor.h",
+    ]
+  }
+
   if (printing_mode == 1) {
     deps += [ "//printing" ]
   }
 }