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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_NO_STATE_PREFETCH_COMMON_NO_STATE_PREFETCH_ORIGIN_H_
#define COMPONENTS_NO_STATE_PREFETCH_COMMON_NO_STATE_PREFETCH_ORIGIN_H_
namespace prerender {
// Origin indicates what caused the NoStatePrefetch.
// NOTE: New values need to be appended, since they are used in histograms.
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused. The values should remain
// synchronized with the enum PrerenderOrigin in
// //tools/metrics/histograms/enums.xml.
enum Origin {
// Obsolete: ORIGIN_LINK_REL_PRERENDER = 0,
// Obsolete: ORIGIN_OMNIBOX_ORIGINAL = 1,
ORIGIN_GWS_PRERENDER = 2,
// Obsolete: ORIGIN_OMNIBOX_CONSERVATIVE = 3,
// Obsolete: ORIGIN_OMNIBOX_EXACT = 4,
// Obsolete: ORIGIN_OMNIBOX = 5,
ORIGIN_NONE = 6,
ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN = 7,
ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN = 8,
// Obsolete: ORIGIN_LOCAL_PREDICTOR = 9,
// Obsolete: ORIGIN_EXTERNAL_REQUEST = 10,
// Obsolete: ORIGIN_INSTANT = 11,
ORIGIN_LINK_REL_NEXT = 12,
// Obsolete: ORIGIN_EXTERNAL_REQUEST_FORCED_PRERENDER = 13,
// Obsolete: ORIGIN_OFFLINE = 14,
ORIGIN_NAVIGATION_PREDICTOR = 15,
// Obsolete: ORIGIN_ISOLATED_PRERENDER = 16,
ORIGIN_SAME_ORIGIN_SPECULATION = 17,
ORIGIN_MAX = 18,
};
// Return a human-readable name for |origin|.
const char* NameFromOrigin(Origin origin);
} // namespace prerender
#endif // COMPONENTS_NO_STATE_PREFETCH_COMMON_NO_STATE_PREFETCH_ORIGIN_H_
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