[Topics] Consolidate and remove deprecated feature flags [chromium/src : main]

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Yao Xiao (Gerrit)

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Jul 30, 2026, 6:52:13 PM (2 days ago) Jul 30
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Yao Xiao . resolved

dom@: PTAL at blink and content/child/runtime_features.cc. Thanks!
boujane@: PTAL at privacy_sandbox. Thanks!
apaseltiner@: PTAL privacy_sandbox_ads_apis_browsertest.cc. Thanks!

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Dominic Farolino (Gerrit)

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    Abe Boujane (Gerrit)

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    Chromium LUCI CQ (Gerrit)

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    Jul 31, 2026, 10:51:43 AM (16 hours ago) Jul 31
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    Chromium LUCI CQ submitted the change

    Change information

    Commit message:
    [Topics] Consolidate and remove deprecated feature flags

    The Topics API is being deprecated and was effectively disabled in prior
    cleanup work, with web-exposed APIs turned into stubs.

    This CL removes redundant feature flags and retains only the main
    `TopicsAPI` feature to control the IDL stubs (i.e., we will use Finch to
    gradually remove the stubs, mitigating web breakage risks).

    Specific changes:
    - Merge the `TopicsDocumentAPI` and `TopicsImgAPI` runtime features into
    the main `TopicsAPI` runtime feature (controlled by
    `network::features::kBrowsingTopics`).
    - Remove `kBrowsingTopicsParameters` and `kBrowsingTopicsDocumentAPI`.
    - Delete confirmed dead code that still references these parameters.
    - Replace the remaining `kBrowsingTopicsTaxonomyVersion` reference with
    the default value, to be cleaned up separately.
    Bug: 461709147
    Change-Id: Iaaeee2b3fb8d517f5876ad3cf28cd3dae01d0078
    Commit-Queue: Yao Xiao <yao...@chromium.org>
    Reviewed-by: Dominic Farolino <d...@chromium.org>
    Reviewed-by: Abe Boujane <bou...@google.com>
    Reviewed-by: Andrew Paseltiner <apase...@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1671841}
    Files:
    • M components/browsing_topics/common/BUILD.gn
    • M components/browsing_topics/common/DEPS
    • M components/browsing_topics/common/semantic_tree.cc
    • M components/privacy_sandbox/mock_privacy_sandbox_settings.h
    • M components/privacy_sandbox/privacy_sandbox_settings.h
    • M components/privacy_sandbox/privacy_sandbox_settings_impl.cc
    • M components/privacy_sandbox/privacy_sandbox_settings_impl.h
    • M components/privacy_sandbox/privacy_sandbox_settings_impl_unittest.cc
    • M content/browser/attribution_reporting/privacy_sandbox_ads_apis_browsertest.cc
    • M content/child/runtime_features.cc
    • M third_party/blink/common/features.cc
    • M third_party/blink/public/common/features.h
    • M third_party/blink/renderer/core/html/html_image_element.idl
    • M third_party/blink/renderer/modules/browsing_topics/browsing_topics_document_supplement.idl
    • M third_party/blink/renderer/platform/runtime_enabled_features.json5
    Change size: L
    Delta: 15 files changed, 18 insertions(+), 418 deletions(-)
    Branch: refs/heads/main
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