Implement API for accessing fonts installed locally on the system.

content/browser/font_access/font_getter.h

+// Copyright (c) 2016 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_FONT_ACCESS_FONT_GETTER_H_
+#define CONTENT_BROWSER_FONT_ACCESS_FONT_GETTER_H_
+
+#include <map>
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace content {
+
+struct FontInformation {
+  FontInformation(std::string path, std::string fullName)
+      : path(path), fullName(fullName) {}
+
+  std::string path;
+  std::string fullName;
+
+  DISALLOW_COPY_AND_ASSIGN(FontInformation);
+};
+typedef std::string FontFamily;
+typedef std::string FontStyle;
+typedef std::map<const FontStyle, const FontInformation> FontStyleMap;
+typedef std::map<const FontFamily, FontStyleMap> FontCacheMap;

[esprehn, 2016/01/26 20:26:45]

hash_map, why do you need the sorting? Also doesn't this increase the browser
process memory footprint by the full filename path of every font on your system?

[Daniel Nishi, 2016/01/26 23:49:26]

The map is arranged so that we can quickly lookup the correct path for a given
font.

It does increase the memory footprint by the path of every font, once the cache
has been populated. 

I suppose we could store the font path on the LocalFontFace object itself to
avoid the caching. As long as we're okay with potential duplication of paths
there, we can avoid persisting the information, I think. Would that be an
acceptable solution?

+
+extern const char kFontAccessToken[];
+
+scoped_ptr<FontCacheMap> GetFontCacheMap();
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_FONT_LIST_H_