net/disk_cache/sql: Add skeleton SqlSharedCacheIsolatedDatabase [chromium/src : main]

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Tsuyoshi Horo (Gerrit)

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Jun 18, 2026, 12:38:22 AM (9 days ago) Jun 18
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File-level comment, Patchset 10 (Latest):
Tsuyoshi Horo . resolved

leimy@

Could you please review this?

Thank you.

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Tsuyoshi Horo (Gerrit)

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File-level comment, Patchset 13 (Latest):
Tsuyoshi Horo . resolved

grt@ Could you please review following files:

  • components/sqlite_vfs/client.h
  • components/sqlite_vfs/metrics_util.cc
  • tools/metrics/histograms/metadata/persistent_cache/histograms.xml


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Tsuyoshi Horo (Gerrit)

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Tsuyoshi Horo . resolved

olivierli@

Could you please review tools/metrics/histograms/metadata/sql/histograms.xml?

Thank you.

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Greg Thompson (Gerrit)

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Patchset-level comments
Greg Thompson . resolved

//components/sqlite_vfs lgtm

File components/sqlite_vfs/metrics_util.cc
Line 40, Patchset 13 (Latest): case Client::kHttpCache:
Greg Thompson . unresolved

could/should this be `kSharedCacheIsolated` (and `".SharedCacheIsolated"` below) to match the tag used for the database? this is the pattern used for `CodeCache` and `ShaderCache`.

File net/BUILD.gn
Line 3679, Patchset 13 (Latest): "//components/sqlite_vfs:pending_file_set",
Greg Thompson . unresolved

not needed -- this is in the `public_deps` of `//components/sqlite_vfs`

File tools/metrics/histograms/metadata/persistent_cache/histograms.xml
Line 54, Patchset 13 (Latest): <variant name="Test"/>
Greg Thompson . unresolved

while you're here, could you remove this line for `"Test"`? it's not used in production code, so having it here just adds a useless item in the uma dashboard. thanks!

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    Tsuyoshi Horo (Gerrit)

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    Jun 18, 2026, 7:31:05 PM (8 days ago) Jun 18
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    File-level comment, Patchset 14 (Latest):
    Tsuyoshi Horo . resolved

    Thank you.

    File components/sqlite_vfs/metrics_util.cc
    Line 40, Patchset 13: case Client::kHttpCache:
    Greg Thompson . resolved

    could/should this be `kSharedCacheIsolated` (and `".SharedCacheIsolated"` below) to match the tag used for the database? this is the pattern used for `CodeCache` and `ShaderCache`.

    Tsuyoshi Horo

    Done

    File net/BUILD.gn
    Line 3679, Patchset 13: "//components/sqlite_vfs:pending_file_set",
    Greg Thompson . resolved

    not needed -- this is in the `public_deps` of `//components/sqlite_vfs`

    Tsuyoshi Horo

    Done

    File tools/metrics/histograms/metadata/persistent_cache/histograms.xml
    Line 54, Patchset 13: <variant name="Test"/>
    Greg Thompson . resolved

    while you're here, could you remove this line for `"Test"`? it's not used in production code, so having it here just adds a useless item in the uma dashboard. thanks!

    Tsuyoshi Horo

    Done

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      Tsuyoshi Horo (Gerrit)

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      Tsuyoshi Horo . resolved

      Could you please review tools/metrics/histograms/metadata/sql/histograms.xml?

      Thank you.

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      Olivier Li (Gerrit)

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      Mingyu Lei (Gerrit)

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      File net/disk_cache/sql/sql_shared_cache_isolated_database.cc
      Line 49, Patchset 18 (Latest): [](auto) { return nullptr; });
      Mingyu Lei . unresolved

      What is the `auto` in the argument list? Why is it not appearing in the next `ASSIGN_OR_RETURN`?

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        Tsuyoshi Horo (Gerrit)

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        File-level comment, Patchset 18 (Latest):
        Tsuyoshi Horo . resolved

        Thank you.

        File net/disk_cache/sql/sql_shared_cache_isolated_database.cc
        Line 49, Patchset 18 (Latest): [](auto) { return nullptr; });
        Mingyu Lei . resolved

        What is the `auto` in the argument list? Why is it not appearing in the next `ASSIGN_OR_RETURN`?

        Tsuyoshi Horo

        MakePendingFileSet() returns base::expected<PendingFileSet, FileSetError> , so ASSIGN_OR_RETURN passes the error object to the lambda.
        On the other hand, SqliteVfsFileSet::Bind() returns std::optional<SqliteVfsFileSet> , which doesn't have an error object, so the lambda takes no arguments.

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          Change information

          Commit message:
          net/disk_cache/sql: Add skeleton SqlSharedCacheIsolatedDatabase

          Add the initial skeleton of SqlSharedCacheIsolatedDatabase to handle
          schema creation and initialization for the SQL shared cache backend.

          Currently implements Init() and verifies database creation via
          sqlite_vfs.

          OBSOLETE_HISTOGRAMS=Deleted `SandboxedVfs.*.Test` histograms are used only in tests. So they are useless in the uma dashboard.
          Bug: 473666511
          Change-Id: I43ea3208b63e53eefb385fa893cb8b9d4e3d3c45
          Commit-Queue: Tsuyoshi Horo <ho...@chromium.org>
          Reviewed-by: Mingyu Lei <le...@chromium.org>
          Reviewed-by: Olivier Li <oliv...@chromium.org>
          Reviewed-by: Greg Thompson <g...@chromium.org>
          Cr-Commit-Position: refs/heads/main@{#1650187}
          Files:
          • M components/sqlite_vfs/client.h
          • M components/sqlite_vfs/metrics_util.cc
          • M net/BUILD.gn
          • M net/disk_cache/sql/DEPS
          • M net/disk_cache/sql/sql_backend_constants.h
          • A net/disk_cache/sql/sql_shared_cache_isolated_database.cc
          • A net/disk_cache/sql/sql_shared_cache_isolated_database.h
          • A net/disk_cache/sql/sql_shared_cache_isolated_database_queries.h
          • A net/disk_cache/sql/sql_shared_cache_isolated_database_unittest.cc
          • M tools/metrics/histograms/metadata/persistent_cache/histograms.xml
          • M tools/metrics/histograms/metadata/sql/histograms.xml
          Change size: L
          Delta: 11 files changed, 433 insertions(+), 2 deletions(-)
          Branch: refs/heads/main
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