[Merge in M47] Do not involve PasswordManagerDriver in filling HTTP-auth forms; also check realm

[Merge in M47] Do not involve PasswordManagerDriver in filling HTTP-auth forms; also check realm

The HTTP authentication is not tied to a renderer and happens completely browser-side.

This CL simplifies the password manager API for filling these forms to avoid referencing the renderer. It also enhances LoginModelObserver to filter irrelevant credentials by realm.

BUG=537823
Review URL: https://codereview.chromium.org/1384283003

Cr-Commit-Position: refs/heads/master@{#352816}
(cherry picked from commit e0e1e99f39349e912612e58249393f2281de4d00)

Solved conflicts:
components/password_manager/core/browser/password_manager.cc contained https://codereview.chromium.org/1402803002, the patch was adapted to match the current ToT for that.
TBR=melandory@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/a05f004a42db051ca1db0c2e8f065dc4b2d35ad7

[vabr (Chromium), 2015-10-23 09:24:08]

Description was changed from

==========
[Merge in M47] Do not involve PasswordManagerDriver in filling HTTP-auth forms;
also check realm

The HTTP authentication is not tied to a renderer and happens completely
browser-side.

This CL simplifies the password manager API for filling these forms to avoid
referencing the renderer. It also enhances LoginModelObserver to filter
irrelevant credentials by realm.

BUG=537823

Review URL: https://codereview.chromium.org/1384283003

Cr-Commit-Position: refs/heads/master@{#352816}
(cherry picked from commit e0e1e99f39349e912612e58249393f2281de4d00)

Solved conflicts:
components/password_manager/core/browser/password_manager.cc contained
https://codereview.chromium.org/1402803002, the patch was adapted to match the
current ToT for that.
==========

to

==========
[Merge in M47] Do not involve PasswordManagerDriver in filling HTTP-auth forms;
also check realm

The HTTP authentication is not tied to a renderer and happens completely
browser-side.

This CL simplifies the password manager API for filling these forms to avoid
referencing the renderer. It also enhances LoginModelObserver to filter
irrelevant credentials by realm.

BUG=537823

Review URL: https://codereview.chromium.org/1384283003

Cr-Commit-Position: refs/heads/master@{#352816}
(cherry picked from commit e0e1e99f39349e912612e58249393f2281de4d00)

Solved conflicts:
components/password_manager/core/browser/password_manager.cc contained
https://codereview.chromium.org/1402803002, the patch was adapted to match the
current ToT for that.
TBR=melandory@chromium.org
==========

[vabr (Chromium), 2015-10-23 09:26:23]

Committed patchset #1 (id:1) manually as
a05f004a42db051ca1db0c2e8f065dc4b2d35ad7 (presubmit successful).