This file requires a migration path for SigninManager::MergeSigninCredentialInCookieJar() before being completely migrated off the SigninManager, setting dependency on 889902.

WIP CL in here:
https://chromium-review.googlesource.com/c/chromium/src/+/1259009

Moving this one to assigned since we can't implement the CL until there's a migration path for SigninManager::MergeSigninCredentialInCookieJar via the newly added class PrimaryAccountMutator (see https://bugs.chromium.org/p/chromium/issues/detail?id=889902#c20)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8fea47aacf80c5e06dc7246a9b3673525cf14b62

commit 8fea47aacf80c5e06dc7246a9b3673525cf14b62
Author: Mario Sanchez Prada <mario@igalia.com>
Date: Thu Dec 06 08:54:03 2018

Convert InlineLoginHandlerImpl to IdentityManager

Replace usage of SigninManager's API with calls to APIs from the
IdentityManager and PrimaryAccountMutator.

Bug:  890813 
Change-Id: I1a70a47e41aa132f0d5e4a1de12bd7c5d5eb31ce
Reviewed-on: https://chromium-review.googlesource.com/c/1259009
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#614289}
[modify] https://crrev.com/8fea47aacf80c5e06dc7246a9b3673525cf14b62/chrome/browser/ui/webui/signin/inline_login_handler_impl.cc
[modify] https://crrev.com/8fea47aacf80c5e06dc7246a9b3673525cf14b62/chrome/browser/ui/webui/signin/inline_login_handler_impl.h