Update DM JSON format.

Update DM JSON format.

Ex. dm --match patch -w bad --key arch x86 gpu nvidia model z620 --properties git_hash abcd build_number 20 ->

{
   "build_number" : "20",
   "git_hash" : "abcd",
   "key" : {
      "arch" : "x86",
      "gpu" : "nvidia",
      "model" : "z620"
   },
   "results" : [
      {
         "key" : {
            "config" : "565",
            "name" : "ninepatch-stretch"
         },
         "md5" : "f78cfafcbabaf815f3dfcf61fb59acc7",
         "options" : {
            "source_type" : "GM"
         }
      },
      {
         "key" : {
            "config" : "8888",
            "name" : "ninepatch-stretch"
         },
         "md5" : "3e8a42f35a1e76f00caa191e6310d789",
         "options" : {
            "source_type" : "GM"
         }
      },
...

This breaks -r, but that's okay.  Going to follow up this CL with one that removes that entirely.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/ea65bfa8ded918b908287e3e3474aaf5cbd12fea

[mtklein, 2014-09-08 20:29:46]

mtklein@google.com changed reviewers:
+ jcgregorio@google.com, mtklein@google.com, stephana@google.com

[jcgregorio, 2014-09-09 12:56:55]

On 2014/09/08 20:29:47, mtklein wrote:

LGTM

[mtklein, 2014-09-09 14:50:51]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-09-09 14:51:24]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/551873003/60001

[commit-bot: I haz the power, 2014-09-09 14:59:50]

Committed patchset #4 (id:60001) as ea65bfa8ded918b908287e3e3474aaf5cbd12fea