WebMCP: bridge streamed args and abort reasons across worlds [chromium/src : main]

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Alex Nahas (Gerrit)

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Mar 10, 2026, 11:59:24 PM (2 days ago) Mar 10

to Raphael Kubo da Costa, Khushal Sagar, chromium...@chromium.org, Kentaro Hara, kinuko...@chromium.org, blink-revie...@chromium.org, mfoltz+wa...@chromium.org, jmedle...@chromium.org, aleventh...@chromium.org, blink-re...@chromium.org, mfoltz+wa...@chromium.org, blink-...@chromium.org, ipc-securi...@chromium.org

Alex Nahas has uploaded the change for review

Commit message

WebMCP: bridge streamed args and abort reasons across worlds

This CL threads the caller ScriptState through streamed testing execution and bridges cross-world args and pre-abort reasons into the tool callback world.

It keeps the same-world fast path and leaves cross-world streamed chunk relay behavior to a follow-up CL.

Change-Id: I15cb12e8ac4d3afc25cb41c4aa507999b8082dd7

Change diff

Change information

Files:

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/web_tests/fast/webmcp/streaming_tools-expected.txt
M third_party/blink/web_tests/fast/webmcp/streaming_tools.html

Change size: L

Delta: 4 files changed, 441 insertions(+), 33 deletions(-)

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