Add chrome perf tests and sniffer to GN build.

content/child/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/child/child.gni")
 
 source_set("child") {
   # Only the public target should depend on this. All other targets (even
   # internal content ones) should depend on the public one.
   visibility = [ "//content/public/child:child_sources" ]
 
   sources = rebase_path(content_child_gypi_values.private_child_sources,
                         ".", "//content")
 
   deps = [
     "//base",
     "//components/tracing",
     "//mojo/common",
     "//mojo/environment:chromium",
     "//mojo/public/interfaces/application",
     "//skia",
     "//third_party/icu",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
+    "//ui/native_theme",
     "//url",
   ]
 
   if (!use_default_render_theme) {
     sources -= [
       "webthemeengine_impl_default.cc",
       "webthemeengine_impl_default.h",
     ]
   }
 
   if (is_android) {
     deps += [
       "//third_party/android_tools:cpu_features",
     ]
   }
 
-  if (!enable_plugins) {
+  if (enable_plugins) {
+    deps += [ "//ppapi:ppapi_proxy" ]
+  } else {
     sources -= [
       "browser_font_resource_trusted.cc",
       "npapi/plugin_host.cc",
       "npapi/plugin_host.h",
       "npapi/plugin_instance.cc",
       "npapi/plugin_instance.h",
       "npapi/plugin_lib.cc",
       "npapi/plugin_lib.h",
       "npapi/plugin_stream.cc",
       "npapi/plugin_stream.h",
@@ skipping 68 matching lines @@
   }
 
   if (!use_openssl) {
     sources += rebase_path(content_child_gypi_values.webcrypto_nss_sources,
                            ".", "//content")
   } else {
     sources += rebase_path(content_child_gypi_values.webcrypto_openssl_sources,
                            ".", "//content")
   }
 }