Initialize SCT fields.

Initialize SCT fields.

This fixes an MSan error introduced by
https://codereview.chromium.org/2294373002/

==31610==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xa7ce15a in WriteBytesCommon base/pickle.cc:478:3
    #1 0xa7ce15a in WriteBytesStatic<4> base/pickle.cc:443:0
    #2 0x98c5407 in WritePOD<int> base/pickle.h:367:5
    #3 0x98c5407 in WriteInt base/pickle.h:229:0
    #4 0x98c5407 in Persist net/cert/signed_certificate_timestamp.cc:43:0
    #5 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #6 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was stored to memory at
    #0 0x98c57fd in Persist net/cert/signed_certificate_timestamp.cc:43:3
    #1 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #2 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was created by a heap allocation
    #0 0x8da8c2 in operator new(unsigned long) ??:0
    #1 0xa68c2f8 in GetX509CertSCT net/test/ct_test_util.cc:220:14
    #2 0x2cb7451 in TestBody net/http/http_response_info_unittest.cc:104:3

Committed: https://crrev.com/76dfb1eb22ab0435d4e0226057b833fe637281df
Cr-Commit-Position: refs/heads/master@{#418956}

[Jeffrey Yasskin, 2016-09-15 19:42:16]

jyasskin@chromium.org changed reviewers:
+ eranm@chromium.org, rsleevi@chromium.org

[Jeffrey Yasskin, 2016-09-15 19:42:22]

The CQ bit was checked by jyasskin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-15 19:42:54]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Ryan Sleevi, 2016-09-15 19:42:57]

lgtm

[Jeffrey Yasskin, 2016-09-15 19:44:40]

The CQ bit was unchecked by jyasskin@chromium.org

[Jeffrey Yasskin, 2016-09-15 19:44:49]

The CQ bit was checked by jyasskin@chromium.org

[commit-bot: I haz the power, 2016-09-15 19:45:24]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-15 20:37:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-15 20:38:56]

Description was changed from

==========
Initialize SCT fields.

This fixes an MSan error introduced by
https://codereview.chromium.org/2294373002/

==31610==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xa7ce15a in WriteBytesCommon base/pickle.cc:478:3
    #1 0xa7ce15a in WriteBytesStatic<4> base/pickle.cc:443:0
    #2 0x98c5407 in WritePOD<int> base/pickle.h:367:5
    #3 0x98c5407 in WriteInt base/pickle.h:229:0
    #4 0x98c5407 in Persist net/cert/signed_certificate_timestamp.cc:43:0
    #5 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #6 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was stored to memory at
    #0 0x98c57fd in Persist net/cert/signed_certificate_timestamp.cc:43:3
    #1 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #2 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was created by a heap allocation
    #0 0x8da8c2 in operator new(unsigned long) ??:0
    #1 0xa68c2f8 in GetX509CertSCT net/test/ct_test_util.cc:220:14
    #2 0x2cb7451 in TestBody net/http/http_response_info_unittest.cc:104:3
==========

to

==========
Initialize SCT fields.

This fixes an MSan error introduced by
https://codereview.chromium.org/2294373002/

==31610==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xa7ce15a in WriteBytesCommon base/pickle.cc:478:3
    #1 0xa7ce15a in WriteBytesStatic<4> base/pickle.cc:443:0
    #2 0x98c5407 in WritePOD<int> base/pickle.h:367:5
    #3 0x98c5407 in WriteInt base/pickle.h:229:0
    #4 0x98c5407 in Persist net/cert/signed_certificate_timestamp.cc:43:0
    #5 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #6 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was stored to memory at
    #0 0x98c57fd in Persist net/cert/signed_certificate_timestamp.cc:43:3
    #1 0x991c383 in Persist net/http/http_response_info.cc:381:18
    #2 0x2cb75d0 in TestBody net/http/http_response_info_unittest.cc:111:18

  Uninitialized value was created by a heap allocation
    #0 0x8da8c2 in operator new(unsigned long) ??:0
    #1 0xa68c2f8 in GetX509CertSCT net/test/ct_test_util.cc:220:14
    #2 0x2cb7451 in TestBody net/http/http_response_info_unittest.cc:104:3

Committed: https://crrev.com/76dfb1eb22ab0435d4e0226057b833fe637281df
Cr-Commit-Position: refs/heads/master@{#418956}
==========

[commit-bot: I haz the power, 2016-09-15 20:38:57]

Patchset 1 (id:??) landed as
https://crrev.com/76dfb1eb22ab0435d4e0226057b833fe637281df
Cr-Commit-Position: refs/heads/master@{#418956}