[M149] WebMCP: 3/3 Cross-origin iframe tool execution and safety hardening [chromium/src : refs/branch-heads/7827]

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Dominic Farolino (Gerrit)

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enums.xml lgtm

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    Alex Moshchuk (Gerrit)

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    merge LTGM

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    Chromium LUCI CQ submitted the change

    Change information

    Commit message:
    [M149] WebMCP: 3/3 Cross-origin iframe tool execution and safety hardening

    Original change's description:
    > WebMCP: 3/3 Cross-origin iframe tool execution and safety hardening
    >
    > This CL implements cross-origin iframe tool execution via the
    > `executeTool()` method on the `ModelContext` interface.
    >
    > Major changes introduced in this CL:
    >  - Introduces the `executeTool()` method on `ModelContext`. To use it,
    >    first you must obtain a `RegisteredTool` dictionary from
    >    `navigator.modelContext.getTools()`. Then, you can pass a tool
    >    directly as the first argument of `executeTool()`:
    >    ```
    >      const [tool] = await navigator.modelContext.getTools();
    >      navigator.modelContext.executeTool(tool, args);
    >    ```
    >    The contents of `RegisteredTool` are mostly to provide identifiable
    >    information about the tool to invokers; but from the browser's
    >    perspective, the tool's `name` and `window` (which the browser
    >    gets a FrameToken from) are used to uniquely identify the tool.
    >  - Modifies the `RegisteredTool` dictionary definition to expose a tool
    >    host's `Window` and `origin`. The Window/name combination uniquely
    >    identify the tool in the frame tree.
    >  - Introduces a `RegisteredToolDeprecated` reduced dictionary for the
    >    ModelContextTesting API to use, so that legacy interface's surface
    >    area remains unchanged after this CL. This keeps ModelContextTesting
    >    operating narrowly on its own Document, and unconcerned with
    >    cross-document tools.
    >  - Performs tool execution with two new IPCs:
    >     - `ExecuteScriptTool()` on ModelContextHost, for the renderer to
    >       request that the browser invokes a tool in another document. It
    >       locates the tool by the frame token that the caller knows the tool
    >       host by and requests the hosting document to invoke the tool.
    >     - `ExecuteScriptTool()` on ModelContext, for the browser to tell a
    >       renderer that owns a tool to invoke it.
    >     - Both IPCs have callbacks: the latter's callback lets the tool host
    >       gives the tool response to the browser, and the former's callback
    >       lets the browser forward it back to the caller.
    >  - Tracks pending tool executions with `ModelContextPageUserData`
    >     - When a tool is executed, the invoker's callback is stored in this
    >       Page-scoped data structure. Then, when a document hosting a
    >       still-running tool gets destroyed, this data structure is
    >       consulted to reject the Promise in the invoker's document.
    >
    > For a sense of remaining work that needs to be done for the iframe use
    > case, see:
    >  - https://crbug.com/509555636
    >  - https://crbug.com/509568047
    >  - https://crbug.com/508306795
    >  - https://crbug.com/508285989
    >  - http://b/481899636
    >
    > R=mfoltz
    >
    > Low-Coverage-Reason: COVERAGE_UNDERREPORTED
    > Bug: 506393880,489045948
    > Change-Id: Id9de2a9f985da2cf34dac9f626180cfb25a253d0
    > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7808168
    > Reviewed-by: Mark Pearson <mpea...@chromium.org>
    > Commit-Queue: Dominic Farolino <d...@chromium.org>
    > Reviewed-by: Mark Foltz <mfo...@chromium.org>
    > Reviewed-by: Alex Moshchuk <ale...@chromium.org>
    > Cr-Commit-Position: refs/heads/main@{#1627321}

    (cherry picked from commit 0a03c5c295b6a3d11ea67f0ce2b1f643861af585)
    Bug: 511154711,506393880,489045948
    Change-Id: Id9de2a9f985da2cf34dac9f626180cfb25a253d0
    Reviewed-by: Dominic Farolino <d...@chromium.org>
    Reviewed-by: Mark Pearson <mpea...@chromium.org>
    Reviewed-by: Alex Moshchuk <ale...@chromium.org>
    Reviewed-by: Daniel Cheng <dch...@chromium.org>
    Reviewed-by: Mark Foltz <mfo...@chromium.org>
    Commit-Queue: Dominic Farolino <d...@chromium.org>
    Cr-Commit-Position: refs/branch-heads/7827@{#476}
    Cr-Branched-From: 9f3e9aaccba63bd2ec30334e45e0bfd07ebcc8f1-refs/heads/main@{#1625079}
    Files:
    • M android_webview/test/data/web_tests/webexposed/global-interface-listing-expected.txt
    • M content/browser/bad_message.h
    • M content/browser/renderer_host/model_context_user_data.cc
    • M content/browser/renderer_host/model_context_user_data.h
    • M content/browser/security_exploit_browsertest.cc
    • M third_party/blink/public/mojom/content_extraction/script_tools.mojom
    • M third_party/blink/renderer/bindings/generated_in_core.gni
    • M third_party/blink/renderer/core/script_tools/model_context.cc
    • M third_party/blink/renderer/core/script_tools/model_context.h
    • M third_party/blink/renderer/core/script_tools/model_context.idl
    • M third_party/blink/renderer/core/script_tools/model_context_testing.cc
    • M third_party/blink/renderer/core/script_tools/model_context_testing.h
    • M third_party/blink/renderer/core/script_tools/model_context_testing.idl
    • M third_party/blink/renderer/core/script_tools/script_tool_types.h
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/detached-frame-executeTool.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-abort.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-across-trees.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-caller-navigate-abort.https-expected.txt
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-caller-navigate-abort.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-invalid-dictionary.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-target-detachment.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-target-navigation.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/executeTool-unauthorized-origin.https.html
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/exposedTo-cross-origin-child.https.html
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/exposedTo-defaults-same-origin.https.html
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/exposedTo-multiple-children.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/opaque-origin-tools.https.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/opaque-origin-tools.https.html.headers
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/permissions-policy.https.html
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/resources/helpers.js
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/resources/iframe-caller.html
    • M third_party/blink/web_tests/external/wpt/webmcp/imperative/resources/iframe-register-tool.html
    • A third_party/blink/web_tests/external/wpt/webmcp/imperative/unregister-during-executeTool.https.html
    • M third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt
    • M tools/metrics/histograms/metadata/stability/enums.xml
    Change size: XL
    Delta: 35 files changed, 1479 insertions(+), 64 deletions(-)
    Branch: refs/branch-heads/7827
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    Gerrit-Change-Number: 7829906
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