Use uint16 for port numbers more pervasively.

Use uint16 for port numbers more pervasively.

We currently use a mixture of ints and uint16s for port numbers.  This triggers a variety of "value possibly truncated" warnings on MSVC (currently disabled) wherever we implicitly truncate.  Fix this by using uint16 consistently through more functions.  (Using int consistently would be more problematic as the majority of third-party/system APIs that use port numbers use 16-bit types for them.)

By far the majority of these changes are fallout from changing IPEndPoint, which is widely used; it'd be difficult to split this CL up into smaller pieces :(

Note that I didn't use uint16_t to avoid introducing inconsistencies between existing uint16 usage and new uint16_t usage.  Conversion of everything to uint16_t can happen later.

This CL was reviewed and approved in pieces in the following CLs:
https://codereview.chromium.org/716223002/
https://codereview.chromium.org/717263003/
https://codereview.chromium.org/717373002/
https://codereview.chromium.org/718273002/
https://codereview.chromium.org/722503002/
Committing as TBR to the original reviewers.

BUG=81439
TEST=none
TBR=gunsch,cpu,jhawkins,davidben,jyasskin,mmenke

Committed: https://crrev.com/cba132919fff063c1cfbe88e9a6f1bf4583729cb
Cr-Commit-Position: refs/heads/master@{#304961}

[Peter Kasting, 2014-11-18 23:45:17]

pkasting@chromium.org changed reviewers:
+ cpu@chromium.org, davidben@chromium.org, gunsch@chromium.org,
jhawkins@chromium.org, jyasskin@chromium.org, mmenke@chromium.org

[Tom Sepez, 2014-11-19 22:47:18]

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

[Tom Sepez, 2014-11-19 22:47:19]

Rubberstamp LGTM on changing int types.

[Peter Kasting, 2014-11-19 22:47:47]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2014-11-19 22:49:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/655063002/160001

[commit-bot: I haz the power, 2014-11-19 22:56:23]

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

[commit-bot: I haz the power, 2014-11-19 22:56:24]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/83756)
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/88555)
  android_aosp on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_aosp/bu...)
  android_arm64_dbg_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_arm64_d...)
  android_chromium_gn_compile_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  android_chromium_gn_compile_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  android_clang_dbg_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_clang_d...)
  android_dbg_tests_recipe on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tes...)
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
  linux_chromium_asan_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_chromeos_compile_dbg_ng on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_gn_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_gn_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_rel_ng on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  ios_rel_device on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device/bu...)
  ios_rel_device_ninja on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  win8_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_rel...)
  win_chromium_compile_dbg on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Peter Kasting, 2014-11-19 23:04:14]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2014-11-19 23:05:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/655063002/180001

[commit-bot: I haz the power, 2014-11-19 23:13:51]

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

[commit-bot: I haz the power, 2014-11-19 23:13:52]

Try jobs failed on following builders:
  linux_chromium_gn_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  linux_chromium_gn_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Peter Kasting, 2014-11-20 00:42:15]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2014-11-20 00:42:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/655063002/200001

[commit-bot: I haz the power, 2014-11-20 03:35:40]

Committed patchset #11 (id:200001)

[commit-bot: I haz the power, 2014-11-20 03:36:16]

Patchset 11 (id:??) landed as
https://crrev.com/cba132919fff063c1cfbe88e9a6f1bf4583729cb
Cr-Commit-Position: refs/heads/master@{#304961}