Revert "[OutOfBlinkSandbox] Reenable the DumpWithoutCrashing."

This reverts commit be0013d4.

Reason for revert: http://crbug.com/1145139

Original change's description:
> [OutOfBlinkSandbox] Reenable the DumpWithoutCrashing.
>
> Those DumpWithoutCrashing have been removed twice.
>
> A few potential issue have been solved recently:
> - [ignore-csp-sandbox-report-only]
> - [sandbox-vs-mhtml]
> - [non-optional-frame-policy]
>
> This patch adds them again. I would like to know if they would still be
> triggered into the wild.
>
> -------
>
> [ignore-csp-sandbox-report-only]:
> https://chromium-review.googlesource.com/c/chromium/src/+/2498605
>
> [sandbox-vs-mhtml]:
> https://docs.google.com/document/d/13jcj_mATRxKakPEGy72YYHZBTBkkNrAHzaNIIjVsC8I
> https://chromium-review.googlesource.com/c/chromium/src/+/2450270
> https://chromium-review.googlesource.com/c/chromium/src/+/2467917
> https://chromium-review.googlesource.com/c/chromium/src/+/2480083
> https://chromium-review.googlesource.com/c/chromium/src/+/2479365
> https://chromium-review.googlesource.com/c/chromium/src/+/2467917
>
> [non-optional-frame-policy]:
> https://chromium-review.googlesource.com/c/chromium/src/+/2460890
>
> Bug: chromium:1041376
> Change-Id: Ie503453ed163b01643a90122b61fa2567ec7660f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2502930
> Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
> Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#821856}

TBR=lukasza@chromium.org,arthursonzogni@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:1041376
Change-Id: I626d2ba70dbfc9038ee00ac2f54d24eeb8967a63
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2517575Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824049}

content/browser/renderer_host/render_frame_host_impl.cc

@@ -9737,17 +9737,6 @@ void RenderFrameHostImpl::CheckSandboxFlags() {
     return;
 
   DCHECK(false);
-
-  base::debug::ScopedCrashKeyString scoped_url(
-      base::debug::AllocateCrashKeyString("url",
-                                          base::debug::CrashKeySize::Size256),
-      GetLastCommittedURL().possibly_invalid_spec());
-  base::debug::ScopedCrashKeyString scoped_sandbox(
-      base::debug::AllocateCrashKeyString("sandbox",
-                                          base::debug::CrashKeySize::Size256),
-      base::StringPrintf("%u, %u", uint32_t(active_sandbox_flags_),
-                         uint32_t(*active_sandbox_flags_control_)));
-  base::debug::DumpWithoutCrashing();
 }
 
 void RenderFrameHostImpl::SetEmbeddingToken(