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It appears that in some rare cases that aren't fully understood yet, old
versions of intents are passed to Chrome instead of the new intents.
This makes it so any new intent parameter isn't there or is of the wrong
type, which can lead to crashes.

This CL attempts to prevent these crashes by adding type checks and null
checks for properties missing in old intent versions.

Bug: 1133825
Change-Id: I55ec931ccdaf1afaf36ab31f73c405ac7c2b49b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441631Reviewed-by: Mark Cogan <marq@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Guillaume Jenkins <gujen@google.com>
Cr-Commit-Position: refs/heads/master@{#813264}