Refactor HInferRepresentation into an HPhase and use the phase zone.

Refactor HInferRepresentation into an HPhase and use the phase zone.

Rename HInferRepresentation to HInferRepresentationPhase,
following naming scheme suggested by danno@chromium.org in
https://codereview.chromium.org/17458002

The HInferRepresentationPhase now uses the phase zone for all its
allocations.

Depends on https://codereview.chromium.org/17587008

R=danno@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=15373

[danno, 2013-06-27 13:45:30]

https://codereview.chromium.org/18054002/diff/1/src/hydrogen-phases.h
File src/hydrogen-phases.h (right):

https://codereview.chromium.org/18054002/diff/1/src/hydrogen-phases.h#newcode37
src/hydrogen-phases.h:37: class HInferRepresentationPhase : public HPhase {
For GVN, we have a separate file. Does it make sense to have a file per phase
rather than this bulk header for all of them (i.e. call this
hydrogen-infer-representation.h)? I think very soon we need a compiler
sub-directory anyway.

[Benedikt Meurer, 2013-06-27 19:50:57]

https://codereview.chromium.org/18054002/diff/1/src/hydrogen-phases.h
File src/hydrogen-phases.h (right):

https://codereview.chromium.org/18054002/diff/1/src/hydrogen-phases.h#newcode37
src/hydrogen-phases.h:37: class HInferRepresentationPhase : public HPhase {
On 2013/06/27 13:45:30, danno wrote:
> For GVN, we have a separate file. Does it make sense to have a file per phase
> rather than this bulk header for all of them (i.e. call this
> hydrogen-infer-representation.h)? I think very soon we need a compiler
> sub-directory anyway.

Done.

[danno, 2013-06-27 20:52:36]

lgtm

[Benedikt Meurer, 2013-06-28 07:40:45]

Committed patchset #2 manually as r15373 (presubmit successful).