Use ShellClientFactory interface to load mojo:profile

Use ShellClientFactory interface to load mojo:profile

- Adds a ShellConnection per BrowserContext so every running
  profile is a virtual browser application with a unique user ID.
- Changes Shell to connect to SCF interfaces as itself while
  while inheriting the target SCF's user ID.
- Adds a SCF to the BrowserContext shell connection
- Exposes mojo:profile through BrowserContext's SCF
- Exposes a mojo::Connector through BrowserContext and updates
  DOMStorageWrapper to use this instead of deprecated MojoAppConnection
- Removes CurrentThreadLoader and DefaultLoader, which are no longer needed

BUG=601884
TEST=localStorage still works for basic set/get in a tab with --mojo-local-storage on

Committed: https://crrev.com/963ad3e895f9bd9de01e428893c1423f524181d3
Cr-Commit-Position: refs/heads/master@{#387004}

[Ken Rockot(use gerrit already), 2016-04-11 16:43:57]

Description was changed from

==========
Use ShellClientFactory interface to load mojo:profile

- Adds a ShellConnection per BrowserContext so every running
  profile is a virtual browser application with a unique user ID.
- Changes Shell to connect to SCF interfaces as itself while
  while inheriting the SCF's user ID.
- Adds a SCF to the BrowserContext shell connection
- Exposes mojo:profile through the BrowserContext's SCF
- Exposes a mojo::Connector through BrowserContext and updates
  DOMStorageWrapper to use this
- Removes CurrentThreadLoader and DefaultLoader

BUG=601884
TEST=localStorage still works for basic set/get in a tab with
--mojo-local-storage on
==========

to

==========
Use ShellClientFactory interface to load mojo:profile

- Adds a ShellConnection per BrowserContext so every running
  profile is a virtual browser application with a unique user ID.
- Changes Shell to connect to SCF interfaces as itself while
  while inheriting the target SCF's user ID.
- Adds a SCF to the BrowserContext shell connection
- Exposes mojo:profile through BrowserContext's SCF
- Exposes a mojo::Connector through BrowserContext and updates
  DOMStorageWrapper to use this instead of deprecated MojoAppConnection
- Removes CurrentThreadLoader and DefaultLoader, which are no longer needed

BUG=601884
TEST=localStorage still works for basic set/get in a tab with
--mojo-local-storage on
==========

[Ken Rockot(use gerrit already), 2016-04-11 16:46:26]

rockot@chromium.org changed reviewers:
+ ben@chromium.org, erg@chromium.org, jam@chromium.org

[Ken Rockot(use gerrit already), 2016-04-11 16:46:26]

erg@ for components/profile_service
jam@ for content
ben@ for mojo

[Elliot Glaysher, 2016-04-11 17:51:53]

lgtm

[jam, 2016-04-11 20:20:38]

lgtm

[Ken Rockot(use gerrit already), 2016-04-12 17:03:14]

ping ben

[Ben Goodger (Google), 2016-04-12 17:10:21]

lgtm

[Ken Rockot(use gerrit already), 2016-04-13 15:32:09]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2016-04-13 15:32:09]

The patchset sent to the CQ was uploaded after l-g-t-m from erg@chromium.org,
jam@chromium.org, ben@chromium.org
Link to the patchset: https://codereview.chromium.org/1871223003/#ps80001
(title: "rebase")

[commit-bot: I haz the power, 2016-04-13 15:32:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1871223003/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1871223003/80001

[commit-bot: I haz the power, 2016-04-13 16:33:36]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2016-04-13 16:36:56]

Description was changed from

==========
Use ShellClientFactory interface to load mojo:profile

- Adds a ShellConnection per BrowserContext so every running
  profile is a virtual browser application with a unique user ID.
- Changes Shell to connect to SCF interfaces as itself while
  while inheriting the target SCF's user ID.
- Adds a SCF to the BrowserContext shell connection
- Exposes mojo:profile through BrowserContext's SCF
- Exposes a mojo::Connector through BrowserContext and updates
  DOMStorageWrapper to use this instead of deprecated MojoAppConnection
- Removes CurrentThreadLoader and DefaultLoader, which are no longer needed

BUG=601884
TEST=localStorage still works for basic set/get in a tab with
--mojo-local-storage on
==========

to

==========
Use ShellClientFactory interface to load mojo:profile

- Adds a ShellConnection per BrowserContext so every running
  profile is a virtual browser application with a unique user ID.
- Changes Shell to connect to SCF interfaces as itself while
  while inheriting the target SCF's user ID.
- Adds a SCF to the BrowserContext shell connection
- Exposes mojo:profile through BrowserContext's SCF
- Exposes a mojo::Connector through BrowserContext and updates
  DOMStorageWrapper to use this instead of deprecated MojoAppConnection
- Removes CurrentThreadLoader and DefaultLoader, which are no longer needed

BUG=601884
TEST=localStorage still works for basic set/get in a tab with
--mojo-local-storage on

Committed: https://crrev.com/963ad3e895f9bd9de01e428893c1423f524181d3
Cr-Commit-Position: refs/heads/master@{#387004}
==========

[commit-bot: I haz the power, 2016-04-13 16:36:57]

Patchset 5 (id:??) landed as
https://crrev.com/963ad3e895f9bd9de01e428893c1423f524181d3
Cr-Commit-Position: refs/heads/master@{#387004}