Remove preferences among favicon types when choosing large icons

Remove preferences among favicon types when choosing large icons

Make all UIs to use the largest available icon regardless of its type.
Prior to this patch, many UI chose favicons over touch icons, as long as
some minimum size was achieved (UI-dependent, often 16x16 on Android due
to default_favicon_min_size).

Sample affected site: m.youtube.com on Android's bookmark or history UI:
- Before: UI chose 16x16 favicon: http://s.ytimg.com/yts/favicon-vflz7uhzw.ico
- After: UI chose 144x144 touch icon:
  http://s.ytimg.com/yts/mobile/img/apple-touch-icon-144x144-precomposed-vflwq-hLZ.png

This change will (in a later CL) allow reducing the number of downloaded
favicons on mobile, because currently two large icons are downloaded,
the largest one per type (one for non-touch icons and the other one for
touch icons), since the FaviconService's API allow clients to define
arbitrary type preferences.

BUG=698671

[mastiz, 2017-04-05 13:13:59]

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

[commit-bot: I haz the power, 2017-04-05 13:14:17]

Dry run: 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, 2017-04-05 13:22:41]

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

[commit-bot: I haz the power, 2017-04-05 13:22:42]

Dry run: Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)
  ios-simulator-xcode-clang on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator-xco...)

[mastiz, 2017-04-05 13:29:20]

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

[commit-bot: I haz the power, 2017-04-05 13:29:39]

Dry run: 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, 2017-04-05 13:42:52]

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

[commit-bot: I haz the power, 2017-04-05 13:42:53]

Dry run: Try jobs failed on following builders:
  chromeos_daisy_chromium_compile_only_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_daisy_...)
  linux_chromium_chromeos_ozone_rel_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[mastiz, 2017-04-05 14:03:44]

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

[commit-bot: I haz the power, 2017-04-05 14:04:07]

Dry run: 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, 2017-04-05 14:19:23]

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

[commit-bot: I haz the power, 2017-04-05 14:19:24]

Dry run: Try jobs failed on following builders:
  chromeos_amd64-generic_chromium_compile_only_ng on
master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_amd64-...)