Reland "[base] Use FuzzedDataProvider included in LLVM package."

This reverts commit 0d6487215e69ff0890c33c866bdf8e0c63ef6d07.

Reason for revert: this didn't help, the iOS bots should either use the Chromium bundled Clang or don't build fuzzers

Original change's description:
> Revert "[base] Use FuzzedDataProvider included in LLVM package."
> 
> This reverts commit 20d2671d9bb37c0545a39be4364134df1c19d44a.
> 
> Reason for revert: Causes build failures on iOS bots, see: https://crbug.com/999096
> 
> Original change's description:
> > [base] Use FuzzedDataProvider included in LLVM package.
> > 
> > Bug: 991200
> > Change-Id: Iee88e3a81057d509e18a2875a3070c5abc17c959
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1774303
> > Auto-Submit: Max Moroz <[email protected]>
> > Commit-Queue: Lei Zhang <[email protected]>
> > Reviewed-by: Lei Zhang <[email protected]>
> > Cr-Commit-Position: refs/heads/master@{#691207}
> 
> [email protected],[email protected]
> 
> Change-Id: I044f8863f8fa7e2bb9e70b0f33e73fdd8bfa2a29
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: 991200, 999096
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1776043
> Reviewed-by: Oskar Sundbom <[email protected]>
> Commit-Queue: Oskar Sundbom <[email protected]>
> Cr-Commit-Position: refs/heads/master@{#691575}

[email protected],[email protected],[email protected]

Change-Id: Ic811649e40c0932146f8fc275e142f47adc3f5f8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 991200, 999096
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1776203
Reviewed-by: Max Moroz <[email protected]>
Commit-Queue: Max Moroz <[email protected]>
Cr-Commit-Position: refs/heads/master@{#691615}
diff --git a/base/pickle_fuzzer.cc b/base/pickle_fuzzer.cc
index 76372fe..90cabb6eb 100644
--- a/base/pickle_fuzzer.cc
+++ b/base/pickle_fuzzer.cc
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <fuzzer/FuzzedDataProvider.h>
+
 #include "base/macros.h"
 #include "base/pickle.h"
-#include "third_party/libFuzzer/src/utils/FuzzedDataProvider.h"
 
 namespace {
 constexpr int kIterations = 16;