Enable compilation of //components/password_manager on iOS with gn.

Enable compilation of //components/password_manager on iOS with gn.

Link against the correct implementation of LoginDatabase for iOS
(login_database_ios.cc instead of login_database_posix.cc).

Add a missing dependency on //sql:test_support to unit_tests target
to fix the following link failures:

Undefined symbols for architecture arm64:
  "sql::ScopedErrorIgnorer::IgnoreError(int)", referenced from:
      password_manager::AffiliationDatabaseTest_Store_Test::TestBody() in affiliation_database_unittest.o
  "sql::ScopedErrorIgnorer::CheckIgnoredErrors()", referenced from:
      password_manager::AffiliationDatabaseTest_Store_Test::TestBody() in affiliation_database_unittest.o
  "sql::ScopedErrorIgnorer::ScopedErrorIgnorer()", referenced from:
      password_manager::AffiliationDatabaseTest_Store_Test::TestBody() in affiliation_database_unittest.o
  "sql::ScopedErrorIgnorer::~ScopedErrorIgnorer()", referenced from:
      password_manager::AffiliationDatabaseTest_Store_Test::TestBody() in affiliation_database_unittest.o
  "sql::test::CorruptSizeInHeader(base::FilePath const&)", referenced from:
      password_manager::AffiliationDatabaseTest_CorruptDBIsRazedThenOpened_Test::TestBody() in affiliation_database_unittest.o
      password_manager::AffiliationDatabaseTest_CorruptDBGetsPoisoned_Test::TestBody() in affiliation_database_unittest.o
  "sql::test::CreateDatabaseFromSQL(base::FilePath const&, base::FilePath const&)", referenced from:
      password_manager::LoginDatabaseMigrationTest::CreateDatabase(base::BasicStringPiece<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >) in login_database_unittest.o

BUG=459705, 341429
Committed: https://crrev.com/372ad6b2c53a55690532d59b1ca6b1da1d6b3d93
Cr-Commit-Position: refs/heads/master@{#359851}

[sdefresne, 2015-11-13 15:02:58]

sdefresne@chromium.org changed reviewers:
+ blundell@chromium.org

[sdefresne, 2015-11-13 15:02:59]

Please take a look.

[sdefresne, 2015-11-13 15:03:06]

Patchset #1 (id:1) has been deleted

[vabr (Chromium), 2015-11-13 15:16:07]

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

[vabr (Chromium), 2015-11-13 15:16:07]

LGTM, thanks!

Vaclav

[blundell, 2015-11-13 15:36:36]

lgtm

[sdefresne, 2015-11-13 16:29:24]

Patchset #1 (id:20001) has been deleted

[sdefresne, 2015-11-16 15:44:42]

The CQ bit was checked by sdefresne@chromium.org

[sdefresne, 2015-11-16 15:44:42]

The patchset sent to the CQ was uploaded after l-g-t-m from vabr@chromium.org,
blundell@chromium.org
Link to the patchset: https://codereview.chromium.org/1436183004/#ps40001
(title: "")

[commit-bot: I haz the power, 2015-11-16 15:45:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1436183004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1436183004/40001

[commit-bot: I haz the power, 2015-11-16 16:21:25]

Committed patchset #1 (id:40001)

[commit-bot: I haz the power, 2015-11-16 16:22:30]

Patchset 1 (id:??) landed as
https://crrev.com/372ad6b2c53a55690532d59b1ca6b1da1d6b3d93
Cr-Commit-Position: refs/heads/master@{#359851}