Remove content/browser dependency on WebFontRenderStyle.

content/public/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("//ppapi/features/features.gni")
 
 # See //content/BUILD.gn for how this works.
 group("child") {
   if (is_component_build) {
     public_deps = [
@@ skipping 10 matching lines @@
       public_deps += [ "//content/ppapi_plugin" ]
     }
   }
 }
 
 source_set("child_sources") {
   # External code should depend in via ":child" above.
   visibility = [ "//content/*" ]
 
   sources = [
+    "child_process_sandbox_support_linux.h",
     "child_thread.h",
     "fixed_received_data.cc",
     "fixed_received_data.h",
     "image_decoder_utils.h",
     "request_peer.h",
     "resource_dispatcher_delegate.h",
     "v8_value_converter.h",
     "worker_thread.h",
   ]
 
   configs += [
     "//build/config/compiler:wexit_time_destructors",
     "//content:content_implementation",
   ]
 
   deps = [
     "//content/child",  # Must not be public_deps!
     "//content/public/common:common_sources",
     "//gin",
+    "//ppapi/c",
   ]
 
   allow_circular_includes_from = [
     # This target is a pair with content/child. They always go together and
     # include headers from each other.
     "//content/child",
   ]
 }