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diff --git a/content/common/font_loader_mac.h b/content/common/font_loader_mac.h
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+++ b/content/common/font_loader_mac.h
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+// 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 CONTENT_COMMON_FONT_LOADER_MAC_H_
+#define CONTENT_COMMON_FONT_LOADER_MAC_H_
+#pragma once
+
+#include <ApplicationServices/ApplicationServices.h>
+
+#include "base/shared_memory.h"
+
+#ifdef __OBJC__
+@class NSFont;
+#else
+class NSFont;
+#endif
+
+// Provides functionality to transmit fonts over IPC.
+//
+// Note about font formats: .dfont (datafork suitcase) fonts are currently not
+// supported by this code since ATSFontActivateFromMemory() can't handle them
+// directly.
+
+class FontLoader {
+ public:
+  // Load a font specified by |font_to_encode| into a shared memory buffer
+  // suitable for sending over IPC.
+  //
+  // On return:
+  //  returns true on success, false on failure.
+  //  |font_data| - shared memory buffer containing the raw data for the font
+  // file.
+  //  |font_data_size| - size of data contained in |font_data|.
+  static bool LoadFontIntoBuffer(NSFont* font_to_encode,
+                                 base::SharedMemory* font_data,
+                                 uint32* font_data_size);
+
+  // Given a shared memory buffer containing the raw data for a font file, load
+  // the font and return a container ref.
+  //
+  // |data| - A shared memory handle pointing to the raw data from a font file.
+  // |data_size| - Size of |data|.
+  //
+  // On return:
+  //  returns true on success, false on failure.
+  //  |font_container| - A font container corresponding to the designated font.
+  //  The caller is responsible for releasing this value via ATSFontDeactivate()
+  //  when done
+  static bool ATSFontContainerFromBuffer(base::SharedMemoryHandle font_data,
+                                         uint32 font_data_size,
+                                         ATSFontContainerRef* font_container);
+};
+
+#endif // CONTENT_COMMON_FONT_LOADER_MAC_H_