Pretty print AlternativeService in test macros.

Pretty print AlternativeService in test macros.

Implement operator<<(std::ostream&, const AlternativeService&) so that when
EXPECT_EQ or ASSERT_EQ fails between two AlternativeService structs, the test
output contains protocol names and hostnames pretty printed, instead of a binary
blob including useless things like the memory address of where std::string
stores the hostname.

Currently used in AlternateProtocolServerPropertiesTest.BrokenShadowsCanonical
only, but more tests involving EXPECT_EQ between AlternativeService structs are
coming.

BUG=392575
Committed: https://crrev.com/a3542c2eb9d3760800d718c51eb9f573a42c6b42
Cr-Commit-Position: refs/heads/master@{#336551}

[Bence, 2015-06-26 20:34:34]

bnc@chromium.org changed reviewers:
+ rch@chromium.org

[Bence, 2015-06-26 20:34:34]

Ryan: PTAL.  Thanks.

[Ryan Hamilton, 2015-06-28 16:10:20]

lgtm

[Bence, 2015-06-29 11:33:11]

The CQ bit was checked by bnc@chromium.org

[commit-bot: I haz the power, 2015-06-29 11:33:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1212813006/1

[commit-bot: I haz the power, 2015-06-29 12:01:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-29 12:01:45]

Try jobs failed on following builders:
  cast_shell_linux on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/cast_shell_linu...)

[Bence, 2015-06-29 13:14:16]

The CQ bit was checked by bnc@chromium.org

[commit-bot: I haz the power, 2015-06-29 13:14:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1212813006/1

[commit-bot: I haz the power, 2015-06-29 13:18:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-29 13:19:15]

Patchset 1 (id:??) landed as
https://crrev.com/a3542c2eb9d3760800d718c51eb9f573a42c6b42
Cr-Commit-Position: refs/heads/master@{#336551}

[grt (UTC plus 2), 2015-06-29 13:56:05]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1218813005/ by grt@chromium.org.

The reason for reverting is: Introduced new static initializers:

# http_server_properties.cc _GLOBAL__sub_I_http_server_properties.cc+0x10
# http_server_properties.cc std::ios_base::Init::Init()@plt
# http_server_properties.cc __cxa_atexit@plt [registers a dtor to run at exit].

[Bence, 2015-06-29 16:51:04]

On 2015/06/29 13:56:05, grt wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1218813005/ by mailto:grt@chromium.org.
> 
> The reason for reverting is: Introduced new static initializers:
> 
> # http_server_properties.cc _GLOBAL__sub_I_http_server_properties.cc+0x10
> # http_server_properties.cc std::ios_base::Init::Init()@plt
> # http_server_properties.cc __cxa_atexit@plt [registers a dtor to run at
exit].

For the record: this is from
https://build.chromium.org/p/chromium/builders/Linux/builds/63906/steps/sizes....
 To locally check, one could build chrome and then run
tools/linux/dump-static-initializers.py out/Debug/chrome.