The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9352a69e3b8cbf81e7a46dd9ea07a7e05ece94ee

commit 9352a69e3b8cbf81e7a46dd9ea07a7e05ece94ee
Author: melandory <melandory@chromium.org>
Date: Thu Jun 23 13:02:31 2016

Don't sync pref which controls the password manager to mobile.

Chrome will start sync prefs on mobile. It's not desired behaviour for the password manager pref, because it collides with the prefs reconciliation.

BUG= 622620 

Review-Url: https://codereview.chromium.org/2084033002
Cr-Commit-Position: refs/heads/master@{#401592}

[modify] https://crrev.com/9352a69e3b8cbf81e7a46dd9ea07a7e05ece94ee/components/password_manager/core/browser/password_manager.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/760a953ded79dfb404f381eba21efd9c7d10b6e6

commit 760a953ded79dfb404f381eba21efd9c7d10b6e6
Author: melandory <melandory@chromium.org>
Date: Thu Jun 23 22:04:05 2016

Don't sync kEnableContinuousSpellcheck  to mobile platforms.

Chrome will start sync prefs on mobile. It's not desired behaviour for the kEnableContinuousSpellcheck.

BUG= 622620 

Review-Url: https://codereview.chromium.org/2086663006
Cr-Commit-Position: refs/heads/master@{#401740}

[modify] https://crrev.com/760a953ded79dfb404f381eba21efd9c7d10b6e6/chrome/browser/spellchecker/spellcheck_factory.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/533065686d0cb35523939ae71d45173aa208a558

commit 533065686d0cb35523939ae71d45173aa208a558
Author: melandory <melandory@chromium.org>
Date: Mon Jun 27 15:52:37 2016

Don't sync homepage pref to mobile platforms.

Chrome will start sync prefs on mobile. For homepage it is not desired.

BUG= 622620 

Review-Url: https://codereview.chromium.org/2092073003
Cr-Commit-Position: refs/heads/master@{#402190}

[modify] https://crrev.com/533065686d0cb35523939ae71d45173aa208a558/chrome/browser/profiles/profile_impl.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/336b04cf3eab38e8663988ff2f2286a57e3d341b

commit 336b04cf3eab38e8663988ff2f2286a57e3d341b
Author: melandory <melandory@chromium.org>
Date: Tue Jun 28 10:04:52 2016

Don't sync browser.show_home_button and homepage_is_newtabpageto mobile platforms.

Chrome will start sync prefs on mobile. For browser.show_home_button it and for homepage_is_newtabpage it is not desired.

BUG= 622620 

Review-Url: https://codereview.chromium.org/2086143004
Cr-Commit-Position: refs/heads/master@{#402436}

[modify] https://crrev.com/336b04cf3eab38e8663988ff2f2286a57e3d341b/chrome/browser/ui/browser_ui_prefs.cc

+zea@ for sync question: I might have misunderstood what you said, but didn't you mention that anything that is not SYNCABLE_PRIORITY_PREF is not synced to mobile devices anyways?

Correct. Normal pref sync is not enabled on mobile devices (yet), but it's something we're hoping to turn on soon. The work melandory@ is doing is necessary before we turn it on (we want to make sure all the SYNCABLE_PREF's are appropriate to sync on mobile).

Ah, gotcha - thank you for the explanation!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a54a050049d669a1c55517159d2c5b0fa95e7e4b

commit a54a050049d669a1c55517159d2c5b0fa95e7e4b
Author: melandory <melandory@chromium.org>
Date: Fri Jul 01 11:31:57 2016

Don't sync session.startup_urls to mobile platforms.

Chrome will start sync prefs to mobile. It's not desired behaviour for
the session.startup_urls and the session.urls_to_restore_on_startup prefs.

BUG= 622620 

Review-Url: https://codereview.chromium.org/2114923002
Cr-Commit-Position: refs/heads/master@{#403436}

[modify] https://crrev.com/a54a050049d669a1c55517159d2c5b0fa95e7e4b/chrome/browser/prefs/session_startup_pref.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c1105ec72a099911751513d4a38a6c9ae3840158

commit c1105ec72a099911751513d4a38a6c9ae3840158
Author: melandory <melandory@chromium.org>
Date: Fri Jul 01 12:11:53 2016

Don't sync default_search_provider.synced_guid to mobile.

Chrome will start sync prefs on mobile. It's not desired behaviour for
the default_search_provider.synced_guid pref.

BUG= 622620 
TBR=stevet@chromium.org

Review-Url: https://codereview.chromium.org/2091763002
Cr-Commit-Position: refs/heads/master@{#403439}

[modify] https://crrev.com/c1105ec72a099911751513d4a38a6c9ae3840158/components/search_engines/template_url_service.cc