Add Pepper TrueType font API plumbing.

ppapi/proxy/truetype_font_singleton_resource.h

Index: ppapi/proxy/truetype_font_singleton_resource.h
diff --git a/ppapi/proxy/truetype_font_singleton_resource.h b/ppapi/proxy/truetype_font_singleton_resource.h
new file mode 100644
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+++ b/ppapi/proxy/truetype_font_singleton_resource.h
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+// 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 PPAPI_PROXY_TRUETYPE_FONT_SINGLETON_RESOURCE_H_
+#define PPAPI_PROXY_TRUETYPE_FONT_SINGLETON_RESOURCE_H_
+
+#include <string>
+#include <vector>
+
+#include "ppapi/proxy/connection.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/thunk/ppb_truetype_font_singleton_api.h"
+
+namespace ppapi {
+
+class TrackedCallback;
+
+namespace proxy {
+
+struct SerializedTrueTypeFontDescription;
+
+// This handles the singleton calls (that don't take a PP_Resource parameter)
+// on the TrueType font interface.
+class TrueTypeFontSingletonResource
+    : public PluginResource,
+      public thunk::PPB_TrueTypeFont_Singleton_API {
+ public:
+  TrueTypeFontSingletonResource(Connection connection, PP_Instance instance);
+  virtual ~TrueTypeFontSingletonResource();
+
+  // Resource override.
+  virtual thunk::PPB_TrueTypeFont_Singleton_API*
+      AsPPB_TrueTypeFont_Singleton_API() OVERRIDE;
+
+  // thunk::PPB_TrueTypeFont_Singleton_API implementation.
+  virtual int32_t GetFontFamilies(
+      PP_Instance instance,
+      const PP_ArrayOutput& output,
+      const scoped_refptr<TrackedCallback>& callback) OVERRIDE;
+
+ private:
+  void OnPluginMsgGetFontFamiliesComplete(
+      scoped_refptr<TrackedCallback> callback,
+      PP_ArrayOutput array_output,
+      const ResourceMessageReplyParams& params,
+      const std::vector<std::string>& data);
+
+  DISALLOW_COPY_AND_ASSIGN(TrueTypeFontSingletonResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_TRUETYPE_FONT_SINGLETON_RESOURCE_H_