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If mojo interfaces are bound to a RenderProcessHost then the interface
cannot be frozen for a specific Frame. This is problematic for
prerendering. Bind them to a RenderFrameHost (via PopulateFrameBinders)
instead.

BUG=chromium:1126758

Change-Id: I8c6683b45737a8276cb28391532b0e6a036386d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2400554
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806896}