Add is_chromecast to GN build.

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/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build/config/win/manifest.gni")
 import("//tools/grit/repack.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 296 matching lines @@
     #deps -= [ 'copy_test_netscape_plugin' ]  TODO(GYP)
   }
 
   if (is_chromeos) {
     deps += [
       "//chromeos",
       "//ui/wm:test_support",
     ]
   }
 
-  if (is_linux) {
+  if (is_linux && !is_chromecast) {
     deps += [ "//third_party/freetype2" ]
   }
 
   if (!enable_plugins) {
     sources -= [
       "browser/shell_plugin_service_filter.cc",
       "browser/shell_plugin_service_filter.h",
     ]
   }
 }
@@ skipping 130 matching lines @@
     deps = [
       "//base",
       "//build/config/sanitizers:deps",
       "//components/crash/content/tools:crash_service",
     ]
 
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
   }
 }