Use the WebKit default fonts when specifying generic font families.

ppapi/shared_impl/ppapi_preferences.h

+// 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.
+
+#ifndef PPAPI_SHARED_IMPL_PPAPI_PREFERENCES_H_
+#define PPAPI_SHARED_IMPL_PPAPI_PREFERENCES_H_
+
+#include "base/string16.h"
+
+struct WebPreferences;
+
+namespace ppapi {
+
+struct Preferences {
+ public:
+  Preferences();
+  explicit Preferences(const WebPreferences& prefs);
+  ~Preferences();
+
+  string16 standard_font_family;
+  string16 fixed_font_family;
+  string16 serif_font_family;
+  string16 sans_serif_font_family;
+  int default_font_size;
+  int default_fixed_font_size;
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_PPAPI_PREFERENCES_H_