Block pretty printing (partial re-revert of 1177123002).

Block pretty printing (partial re-revert of 1177123002).

Revert "Revert of Decompiler improvements. (patchset #2 id:20001 of https://codereview.chromium.org/1177123002/)"

This reverts commit e2ce4681655a610631e6a6e17dec62e6c4bdef43, avoiding the hex->dec changes, and re-introducing the block pretty printing of the original CL.

The hex-dec issue would be handled separately.
BUG=

Committed: https://crrev.com/9b62bb32fb8986c271f177d86cf234b92bca46dd
Cr-Commit-Position: refs/heads/master@{#29063}

[Mircea Trofin, 2015-06-17 00:11:52]

mtrofin@chromium.org changed reviewers:
+ mstarzinger@chromium.org

[Jarin, 2015-06-17 04:56:42]

jarin@chromium.org changed reviewers:
+ jarin@chromium.org

[Jarin, 2015-06-17 04:56:42]

lgtm

[Mircea Trofin, 2015-06-17 05:00:32]

The CQ bit was checked by mtrofin@chromium.org

[commit-bot: I haz the power, 2015-06-17 05:00:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1186273005/1

[commit-bot: I haz the power, 2015-06-17 05:44:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-17 05:44:40]

Patchset 1 (id:??) landed as
https://crrev.com/9b62bb32fb8986c271f177d86cf234b92bca46dd
Cr-Commit-Position: refs/heads/master@{#29063}