Supporting high dpi favicons in Instant Extended.

chrome/common/favicon_types.h

Index: chrome/common/favicon_types.h
diff --git a/chrome/common/favicon_types.h b/chrome/common/favicon_types.h
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+// Copyright 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 CHROME_COMMON_FAVICON_TYPES_H_
+#define CHROME_COMMON_FAVICON_TYPES_H_
+
+namespace chrome {
+
+// Defines the icon types. They are also stored in icon_type field of favicons
+// table.
+// The values of the IconTypes are used to select the priority in which favicon
+// data is returned in HistoryBackend and ThumbnailDatabase. Data for the
+// largest IconType takes priority if data for multiple IconTypes is available.
+enum IconType {
+  INVALID_ICON = 0x0,
+  FAVICON = 1 << 0,
+  TOUCH_ICON = 1 << 1,
+  TOUCH_PRECOMPOSED_ICON = 1 << 2
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_FAVICON_TYPES_H_