Tim Armstrong has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/10532 )

Change subject: IMPALA-6953: part 1: clean up DiskIoMgr
......................................................................

IMPALA-6953: part 1: clean up DiskIoMgr

There should be no behavioural changes as a result of
this refactoring.

Make DiskQueue an encapsulated class.

Remove friend classes where possible, either by using public
methods or moving code between classes.

Move method into protected in some cases.

Split GetNextRequestRange() into two methods that
operate on DiskQueue and RequestContext state. The methods
belong to the respective classes.

Reduce transitive #include dependencies to hopefully help
with build time.

Testing:
Ran core tests.

Change-Id: I5a6e393f8c01d10143cbac91108af37f6498c1b1
Reviewed-on: http://gerrit.cloudera.org:8080/10245
Reviewed-by: Tim Armstrong <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
Reviewed-on: http://gerrit.cloudera.org:8080/10532
Reviewed-by: Thomas Marshall <[email protected]>
Tested-by: Thomas Marshall <[email protected]>
---
0 files changed, 0 insertions(+), 0 deletions(-)

Approvals:
  Thomas Marshall: Looks good to me, approved; Verified
  Impala Public Jenkins: Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: 2.x
Gerrit-MessageType: merged
Gerrit-Change-Id: I5a6e393f8c01d10143cbac91108af37f6498c1b1
Gerrit-Change-Number: 10532
Gerrit-PatchSet: 2
Gerrit-Owner: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Thomas Marshall <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>

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