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// Copyright 2015 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_SITE_ISOLATION_POLICY_H_
#define CONTENT_COMMON_SITE_ISOLATION_POLICY_H_
#include "base/macros.h"
#include "content/common/content_export.h"
#include "url/gurl.h"
namespace content {
// A centralized place for making policy decisions about out-of-process iframes,
// site isolation, --site-per-process, and related features.
//
// This is currently static because all these modes are controlled by command-
// line flags.
//
// These methods can be called from any thread.
class CONTENT_EXPORT SiteIsolationPolicy {
public:
// Returns true if the current process model might allow the use of cross-
// process iframes. This should typically used to avoid executing codepaths
// that only matter for cross-process iframes, to protect the default
// behavior.
//
// Note: Since cross-process frames will soon be possible by default, usage
// should be limited to temporary stop-gaps.
//
// Instead of calling this method, prefer to examine object state to see
// whether a particular frame happens to have a cross-process relationship
// with another, or to consult DoesSiteRequireDedicatedProcess() to see if a
// particular site merits protection.
static bool AreCrossProcessFramesPossible();
// Returns true if every site should be placed in a dedicated process.
static bool UseDedicatedProcessesForAllSites();
// Returns true if navigation and history code should maintain per-frame
// navigation entries. This is an in-progress feature related to site
// isolation, so the return value is currently tied to --site-per-process.
// TODO(creis, avi): Make this the default, and eliminate this.
static bool UseSubframeNavigationEntries();
private:
SiteIsolationPolicy(); // Not instantiable.
DISALLOW_COPY_AND_ASSIGN(SiteIsolationPolicy);
};
} // namespace content
#endif // CONTENT_COMMON_SITE_ISOLATION_POLICY_H_
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