This is coming along. The proposed patches work in that they can handle the single case of a doubly-embedded content process that can make a privileged call to get the quads relative to the top-level browsing context. Here's what's still untested: 1) Measurements relative to another browsing context that is an ancestor of the calling process . 2) Measurements relative to another browsing context entirely separate from the ancestors of the calling process. 3) Anything that uses the JSWindowActor message passing paradigm to make the call in the first place. Right now it's spoofed. But I wanted to get this out there to start getting reviewer feedback.
Bug 1593756 Comment 36 Edit History
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This is coming along. The proposed patches work in that they can handle the single case of a doubly-embedded content process that can make a privileged call to get the quads relative to the top-level browsing context. Here's what's still untested: 1) Measurements relative to another browsing context that is an ancestor of the calling process. 2) Measurements relative to another browsing context entirely separate from the ancestors of the calling process. 3) Anything that uses the JSWindowActor message passing paradigm to make the call in the first place. Right now it's spoofed. But I wanted to get this out there to start getting reviewer feedback.