Add Pepper TrueType font API plumbing.

content/browser/renderer_host/pepper/pepper_truetype_font_list.h

Index: content/browser/renderer_host/pepper/pepper_truetype_font_list.h
diff --git a/content/browser/renderer_host/pepper/pepper_truetype_font_list.h b/content/browser/renderer_host/pepper/pepper_truetype_font_list.h
new file mode 100644
index 0000000000000000000000000000000000000000..c0ce7827d5329393eebf94aab95a62276ed39677
--- /dev/null
+++ b/content/browser/renderer_host/pepper/pepper_truetype_font_list.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_LIST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_LIST_H_
+
+#include <string>
+#include <vector>
+
+namespace content {
+
+// Adds font family names on the host platform to the vector of strings.
+//
+// This function is potentially slow (the system may do a bunch of I/O) so be
+// sure not to call this on a time-critical thread like the UI or I/O threads.
+void GetFontFamilies_SlowBlocking(std::vector<std::string>* font_families);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_TRUETYPE_FONT_LIST_H_