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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
module performance_manager.mojom;
import "third_party/blink/public/mojom/tokens/tokens.mojom";
// Stores information about an iframe element from the point of view of the
// document that hosts the iframe. This is used for purely informational
// purposes in the performance.measureUserAgentSpecificMemory API to identify
// an iframe in memory usage reports.
struct IframeAttributionData {
// The value of the "id" attribute associated with the iframe element.
string? id;
// The value of the "src" attribute associated with the iframe element. We
// don't use an URL because we don't need to parse this, or otherwise use
// it as an URL, and URL objects have a large memory footprint.
string? src;
};
// Identifies a V8Context type. Note that this roughly corresponds to the
// world types defined in blink, but with some simplifications.
enum V8ContextWorldType {
// The main world, corresponding to a frame / document.
kMain,
// Corresponds to the main world of a worker or worklet.
kWorkerOrWorklet,
// Corresponds to a ShadowRealm.
kShadowRealm,
// Corresponds to an extension. Will have a stable extension ID.
kExtension,
// Corresponds to a non-extension isolated world. Will have a human readable
// name.
kIsolated,
// Corresponds to the devtools inspector. Will not have a human readable
// name or a stable id.
kInspector,
// Corresponds to the regexp world. This world is unique in that it is per
// v8::Isolate, and not associated with any individual execution context.
// Will not have a human-readable name or stable id.
kRegExp,
};
// Information describing a V8 Context. A context is a unit of accounting for
// resource usage, and corresponds to a "world" in Blink parlance.
struct V8ContextDescription {
// The unique token that names the world.
blink.mojom.V8ContextToken token;
// The type of this world.
V8ContextWorldType world_type;
// Identifies this world. Only set for extension and isolated worlds. For
// extension worlds this corresponds to the stable extension ID. For other
// isolated worlds this is a human-readable description.
string? world_name;
// The identity of the execution context that this V8Context is associated
// with. This is specified for all world types, except kRegExp worlds.
blink.mojom.ExecutionContextToken? execution_context_token;
};
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