Use absl::flat_hash_map in url_template [chromium/src : main]

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Adam Rice (Gerrit)

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Jun 17, 2026, 7:21:15 AM (10 days ago) Jun 17
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Yoichi Osato (Gerrit)

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Jun 18, 2026, 12:53:33 AM (9 days ago) Jun 18
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    Chromium LUCI CQ (Gerrit)

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    Jun 18, 2026, 12:58:55 AM (9 days ago) Jun 18
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    Chromium LUCI CQ submitted the change

    Change information

    Commit message:
    Use absl::flat_hash_map in url_template

    Replace use of std::unordered_map with absl::flat_hash_map in the
    parameters of url_template::Expand(). This reduces CPU and memory usage.

    The choice of absl::flat_hash_map rather than base::flat_map was because
    QUICHE already uses absl::flat_hash_map for this purpose so it avoids
    a container conversion.

    Remove "using std::string" from header file url_template.h. It causes
    namespace pollution and is a style guide violation.
    Change-Id: Iedd15a34404d19f3b74244b44f3147728160ba39
    Commit-Queue: Yoichi Osato <yoi...@chromium.org>
    Reviewed-by: Yoichi Osato <yoi...@chromium.org>
    Auto-Submit: Adam Rice <ri...@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1648799}
    Files:
    • M net/dns/dns_http_attempt.cc
    • M net/dns/dns_transaction_unittest.cc
    • M net/dns/dns_util.cc
    • M net/dns/filtering_details_url_generator.cc
    • M net/dns/public/dns_over_https_server_config.cc
    • M net/third_party/quiche/overrides/quiche_platform_impl/quiche_url_utils_impl.cc
    • M net/third_party/uri_template/uri_template.cc
    • M net/third_party/uri_template/uri_template.h
    • M net/third_party/uri_template/uri_template_fuzzer.cc
    • M net/third_party/uri_template/uri_template_test.cc
    Change size: M
    Delta: 10 files changed, 24 insertions(+), 26 deletions(-)
    Branch: refs/heads/main
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    Gerrit-MessageType: merged
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    Gerrit-Change-Id: Iedd15a34404d19f3b74244b44f3147728160ba39
    Gerrit-Change-Number: 7954603
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    Gerrit-Reviewer: Chromium LUCI CQ <chromiu...@luci-project-accounts.iam.gserviceaccount.com>
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