GN: Make content and content_shell work when !enable_plugins

content/shell/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("//tools/grit/repack.gni")
 import("//tools/grit/grit_rule.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 196 matching lines @@
     "//base:base_static",
     "//base/allocator",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//components/crash/app",
     "//content:resources",
     "//content/app:both",
     "//content/app/resources",
     "//content/app/strings",
     "//content/gpu",
-    "//content/ppapi_plugin",
     "//content/public/browser",
     "//content/public/common",
     "//content/public/plugin",
     "//content/public/renderer",
     "//content/public/utility",
     "//content/test:layouttest_support",
     "//gin",
     "//gpu",
     "//ipc",
     "//media",
     "//net",
     "//net:net_resources",
     "//skia",
     "//storage/browser",
     "//third_party/WebKit/public:blink",
     "//third_party/WebKit/public:resources",
     "//third_party/WebKit/public:test_support",
     "//third_party/icu",
     "//ui/base",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gfx/ipc",
     "//ui/gl",
     "//url",
     "//v8",
     #'copy_test_netscape_plugin',  TODO(GYP)
   ]
+  if (enable_plugins) {
+    deps += [ "//content/ppapi_plugin" ]
+  }
 
   if (is_win) {
     #'LinkIncremental': '<(msvs_large_module_debug_link_mode)',  TODO(GYP)
 
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     cflags = [ "/wd4267" ]
   }
 
   if (is_linux) {
     configs += [ "//build/config/linux:fontconfig" ]
@@ skipping 204 matching lines @@
   }
 
   if (!is_android || !is_android_webview_build) {
     # Some tests rely on this tool. It might be nicer if these tests relied on
     # image diff rather than having content shell depend on it.
     datadeps = [
       "//tools/imagediff($host_toolchain)",
     ]
   }
 }