Revert of Remove CFI blacklists entries for the fixed bug. (patchset #1 id:1...

Revert of Remove CFI blacklists entries for the fixed bug. (patchset #1 id:1 of https://codereview.chromium.org/2445033002/ )

Reason for revert:
Broke 'CFI Linux Full' bot:
https://build.chromium.org/p/chromium.fyi/builders/CFI%20Linux%20Full/builds/657/steps/blink_heap_unittests/logs/HeapTest.VectorDestructorsWithVtable

Original issue's description:
> Remove CFI blacklists entries for the fixed bug.
>
> BUG=568891
>
> Committed: https://crrev.com/08f73f5e954340b0c0b5e29f75568ffdebb80588
> Cr-Commit-Position: refs/heads/master@{#427126}

TBR=pcc@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=568891

Review-Url: https://codereview.chromium.org/2446803004
Cr-Commit-Position: refs/heads/master@{#427168}

tools/cfi/blacklist.txt

@@ -58,6 +58,11 @@ fun:*DatabaseContext*contextDestroyed*
 # so exclude source file for now. 
 src:*LifecycleObserver.h*
 
+# Blink wtf::Vector cast on non-initialized data
+# https://crbug.com/568891
+src:*wtf/Vector.h*
+src:*wtf/PartitionAllocator.h*
+
 #############################################################################
 # Methods disabled due to perf considerations.