Alexey Serbin has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/22121 )

Change subject: [tablet] create CompactionOrFlushInput wrapped into shared_ptr
......................................................................

[tablet] create CompactionOrFlushInput wrapped into shared_ptr

Prior to this patch, it was necessary to re-wrap pointers to newly
created CompactionOrFlushInput objects from std::unique_ptr or raw
pointers into std::shared_ptr since MergeCompactionInput::MergeState
stores std::shared_ptr<CompactionOrFlushInput> as one of its fields.
It resulted in one extra memory allocation compared with a case when
using std::make_shared to create CompactionOrFlushInput object wrapped
into std::shared_ptr from the very beginning [1].

This patch addresses the issue described above, so now all the related
factories of CompactionOrFlushInput objects call std::make_shared
to create CompactionOrFlushInput objects wrapped into std::shared_ptr
from the very beginning.

This patch doesn't contain any functional modifications.

[1] https://en.cppreference.com/w/cpp/memory/shared_ptr

Change-Id: I442b6ad3780c700bd3b1d357e24dbb2733aff8bf
Reviewed-on: http://gerrit.cloudera.org:8080/22121
Tested-by: Alexey Serbin <[email protected]>
Reviewed-by: Mahesh Reddy <[email protected]>
Reviewed-by: Abhishek Chennaka <[email protected]>
---
M src/kudu/tablet/compaction-test.cc
M src/kudu/tablet/compaction.cc
M src/kudu/tablet/compaction.h
M src/kudu/tablet/diskrowset.cc
M src/kudu/tablet/diskrowset.h
M src/kudu/tablet/memrowset.cc
M src/kudu/tablet/memrowset.h
M src/kudu/tablet/mock-rowsets.h
M src/kudu/tablet/rowset.cc
M src/kudu/tablet/rowset.h
M src/kudu/tablet/tablet.cc
11 files changed, 67 insertions(+), 74 deletions(-)

Approvals:
  Alexey Serbin: Verified
  Mahesh Reddy: Looks good to me, but someone else must approve
  Abhishek Chennaka: Looks good to me, approved

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I442b6ad3780c700bd3b1d357e24dbb2733aff8bf
Gerrit-Change-Number: 22121
Gerrit-PatchSet: 3
Gerrit-Owner: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Abhishek Chennaka <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Ashwani Raina <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Mahesh Reddy <[email protected]>
Gerrit-Reviewer: Yifan Zhang <[email protected]>

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