[Webkit-unassigned] [Bug 213825] New: Allow the File objet to be created with a replacement file

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213825

            Bug ID: 213825
           Summary: Allow the File objet to be created with a replacement
                    file
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com

This work is towards bug 213347.

The goal is to enable the UIProcess to pass an original path and an optional replacement path to the WebProcess, e.g. a HIEF image and its transcoded PNG image. The Web process will create the File object with the replacement file but will register the Blob in the NetworkProcess with both: the original file and the replacement file. The Blob in the NetworkProcess will delete the replacement file when it is destroyed.

It is important to create the File object with the replacement file because it needs to get the size and the bytes of the replacement file not the original files.

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