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Instruments HTMLFrameOwnerElement to notify RendererResourceCoordinator
whenever the content frame changes. If the new content frame is a
RemoteFrame, RendererResourceCoordinator will notify PerformanceManager
of the frame's RemoteFrameToken and some attribution information for the
iframe. PerformanceManager stores this information in V8ContextTracker.

Also updates frame_test_helpers::CreateProvisional to accept local
frames since the underlying WebLocalFrame::CreateProvisional now allows
this.

Bug: 1085129
Change-Id: I43d7d7f1309db9c4b1760ca32983c0e8a2f51a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363710Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Commit-Queue: Joe Mason <joenotcharles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828284}