Use the WebKit default fonts when specifying generic font families.

ppapi/proxy/ppb_font_proxy.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/proxy/ppb_font_proxy.h"
 
 #include "base/bind.h"
 #include "ppapi/c/dev/ppb_font_dev.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppb_image_data_proxy.h"
 #include "ppapi/proxy/serialized_var.h"
+#include "ppapi/shared_impl/ppapi_preferences.h"
 #include "ppapi/shared_impl/resource_object_base.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 #include "ppapi/thunk/thunk.h"
 
 using ppapi::thunk::PPB_ImageData_API;
 using ppapi::WebKitForwarding;
 
 namespace pp {
 namespace proxy {
@@ skipping 74 matching lines @@
       webkit_event_(false, false) {
   const std::string* face = PluginVarTracker::GetInstance()->GetExistingString(
       desc.face);
 
   WebKitForwarding* forwarding = GetDispatcher()->GetWebKitForwarding();
 
   WebKitForwarding::Font* result = NULL;
   RunOnWebKitThread(base::Bind(&WebKitForwarding::CreateFontForwarding,
                                base::Unretained(forwarding),
                                &webkit_event_, desc,
-                               face ? *face : std::string(), &result));
+                               face ? *face : std::string(),
+                               GetDispatcher()->preferences(),
+                               &result));
   font_forwarding_.reset(result);
 }
 
 Font::~Font() {
 }
 
 ppapi::thunk::PPB_Font_API* Font::AsFont_API() {
   return this;
 }
 
@@ skipping 99 matching lines @@
   return result;
 }
 
 void Font::RunOnWebKitThread(const base::Closure& task) {
   GetDispatcher()->PostToWebKitThread(FROM_HERE, task);
   webkit_event_.Wait();
 }
 
 }  // namespace proxy
 }  // namespace pp