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This reverts commit 04dc0257.

Reason for revert: This was a debugging CL to help get information on a DumpWithoutCrash.

Original change's description:
> Add referrer DumpWithoutCrash to WebURLLoaderImpl
> 
> The network service's
> OnCancelURLRequestWithPolicyViolatingReferrerHeader method is called
> after it has been determined that a URLRequest's referrer does not match
> what the policy demands. This method performs a DumpWithoutCrash for
> debugging. However, this is called within the network service, so the
> path of the request's creation is not captured in the stack trace,
> making it less useful.
> 
> This CL checks whether or not a request's referrer matches what its
> policy demands earlier, when a network::ResourceRequest is created by
> WebURLLoaderImpl. This captures a better picture of a renderer-initiated
> request's origins in the stack trace, which is much more useful for
> debugging.
> 
> Bug: 1004083
> Change-Id: I867e488a860e2ac042a1eb93bff04e5f10a3126e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1803936
> Commit-Queue: Dominic Farolino <dom@chromium.org>
> Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#696684}

TBR=yhirano@chromium.org,mmenke@chromium.org,dom@chromium.org

Change-Id: If4759af2fa77deb36fd36a75b0a09f496f06a79f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1004083
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1806617Reviewed-by: Dominic Farolino <dom@chromium.org>
Commit-Queue: Dominic Farolino <dom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696772}