[Webkit-unassigned] [Bug 164268] New: Web Inspector: Fix double remove of ResourceCollection if type changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164268

            Bug ID: 164268
           Summary: Web Inspector: Fix double remove of ResourceCollection
                    if type changes
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dcrousso+webkit at gmail.com
                CC: bburg at apple.com, joepeck at webkit.org,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

If a ResourceCollection is created without a type, and a Resource object is added to it, a sub-collection (also a ResourceCollection) is created for that specific type and stored in a Map.  If the type on that Resource changes, the `WebInspector.Resource.Event.TypeDidChange` event listeners for both the "parent" collection and the sub-collection will be fired, and both attempt to remove the resource from the sub-collection of that type:
 - The "parent" tries to add it to the sub-collection of the new type (creating one if it does not exist) and remove it from the sub-collection of the old type
 - The sub-collection of the old type tries to remove it from itself since it has a specified type, and changing types means that it no longer matches

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