prerender_features.cc | Explore in Territory

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/preloading/prerender/prerender_features.h"

#include "third_party/blink/public/common/features.h"

namespace features {

// This was used for enabling a new limit and scheduler for prerender triggers
// (crbug.com/1464021). Now the new implementation is used by default and this
// flag is just for injecting parameters through field trials.
BASE_FEATURE(…);

// Allows activation in background tab. For now, this is used only on web
// platform tests on macOS to run activation with target hint tests that have
// race conditions between visibility change and activation start on a prerender
// WebContents. Note that this issue does not happen on browser_tests, so this
// could be specific to WPT setup.
// TODO(crbug.com/40249964): Allow activation in background by default.
BASE_FEATURE(…);

// Prerender2 Embedders trigger based on rules decided by the browser. Prevent
// the browser from triggering on the hosts listed.
// Blocked hosts are expected to be passed as a comma separated string.
// e.g. example1.test,example2.test
BASE_FEATURE(…);
const base::FeatureParam<std::string> kPrerender2EmbedderBlockedHostsParam{ … };

// Enables fallback from prerender to prefetch for Speculation Rules.
// See https://crbug.com/342089123 for more details.
BASE_FEATURE(…);

const base::FeatureParam<int>
    kPrerender2NoVarySearchWaitForHeadersTimeoutEagerPrerender{ … };

const base::FeatureParam<int>
    kPrerender2NoVarySearchWaitForHeadersTimeoutModeratePrerender{ … };

const base::FeatureParam<int>
    kPrerender2NoVarySearchWaitForHeadersTimeoutConservativePrerender{ … };

const base::FeatureParam<int>
    kPrerender2NoVarySearchWaitForHeadersTimeoutForEmbedders{ … };

// If enabled, suppresses prerendering on slow network.
BASE_FEATURE(…);

// Regarding how this number was chosen, see the design doc linked from
// crbug.com/350519234.
const base::FeatureParam<base::TimeDelta>
    kSuppressesPrerenderingOnSlowNetworkThreshold{ … };

}  // namespace features
chromium/content/browser/preloading/prerender/prerender_features.cc
