Revert of Tenure descriptor arrays. (patchset #1 id:1 of...

Revert of Tenure descriptor arrays. (patchset #1 id:1 of https://codereview.chromium.org/1476913002/ )

Reason for revert:
[Sheriff] Breaks gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/544

Original issue's description:
> Tenure descriptor arrays.
>
> BUG=
>
> Committed: https://crrev.com/38ec44f3bde8c16448e093b6595d0452e189023f
> Cr-Commit-Position: refs/heads/master@{#32289}

TBR=ishell@chromium.org,hpayer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1477003003

Cr-Commit-Position: refs/heads/master@{#32294}

src/objects.cc

@@ -9823,7 +9823,7 @@ Handle<DescriptorArray> DescriptorArray::Allocate(Isolate* isolate,
   int size = number_of_descriptors + slack;
   if (size == 0) return factory->empty_descriptor_array();
   // Allocate the array of keys.
-  Handle<FixedArray> result = factory->NewFixedArray(LengthFor(size), TENURED);
+  Handle<FixedArray> result = factory->NewFixedArray(LengthFor(size));
 
   result->set(kDescriptorLengthIndex, Smi::FromInt(number_of_descriptors));
   result->set(kEnumCacheIndex, Smi::FromInt(0));