Use the WebKit default fonts when specifying generic font families.

ppapi/shared_impl/ppapi_preferences.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/shared_impl/ppapi_preferences.h"
+
+#include "webkit/glue/webpreferences.h"
+
+namespace ppapi {
+
+Preferences::Preferences()
+    : default_font_size(0),
+      default_fixed_font_size(0) {
+}
+
+Preferences::Preferences(const WebPreferences& prefs)
+    : standard_font_family(prefs.standard_font_family),
+      fixed_font_family(prefs.fixed_font_family),
+      serif_font_family(prefs.serif_font_family),
+      sans_serif_font_family(prefs.sans_serif_font_family),
+      default_font_size(prefs.default_font_size),
+      default_fixed_font_size(prefs.default_fixed_font_size) {
+}
+
+Preferences::~Preferences() {
+}
+
+}  // namespace ppapi