Remove ExtensionService::extension_prefs()

Callers use ExtensionPrefs::Get instead of depending on
ExtensionService for access. Where appropriate, other
nearby, unnecessary references to ExtensionService have
also been removed.

BUG=341181
TBR=benwells@chromium.org,benjhayden@chromium.org,akalin@chromium.org,pkotwicz@chromium.org,stevenjb@chromium.org,sky@chromium.org,dbeam@chromium.org,finnur@chromium.org

Review URL: https://codereview.chromium.org/156843004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251958 0039d316-1c4b-4281-b951-d872f2087c98
Refactor the TrayAudio code so that it can be used by other platforms.
The motivation here is to introduce the volume slider tray UI into
Windows Ash.

This change does not actually add tray audio UI to other platforms,
only moves some non-chromeos specific things out of the chromeos
platform folders, so that we can hook in the native Audio APIs
of other platforms to the tray UI.

At a high level, this change does the following:

1) Move tray_audio out of chromeos/ so that other platforms can
use the UI that it provides.
2) Decouples TrayAudio from CrasAudioHandler by introducing a
new delegate, in a similar vein to what is done with all the other
handlers (e.g. the BluetoothHandler)
3) Move the additional views (VolumeView, etc) to their own files
so they can be used by other platforms as well.

TEST=
 On CrOS physical device, verified that:
 1) Keyboard volume buttons function appropriately and display the
    volume view
 2) AudioDetailView still is accessible at the correct times
 3) Adjusting the volume (via the keyboard shortcuts or via the
    slider) correctly change the output volume.
 4) UI still behaves correctly (e.g. icons update as the volume
    changes, mute button works, etc).

BUG=227247

Review URL: https://codereview.chromium.org/163953007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251959 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251959
Move Windows Jump List boilerplate out of jumplist_win for reuse

JumpListUpdater encapsulates the boilerplate for updating Windows
jump lists. Most of this code was moved out of jumplist_win for
reuse by app windows. COM interface definitions were removed from
jumplist_win.cc.

BUG=339253
TEST=Right-click on the Chrome icon in the Windows 7+ taskbar and
verify that the functionality has not changed.

Review URL: https://codereview.chromium.org/168583011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251960 0039d316-1c4b-4281-b951-d872f2087c98
[webcrypto] Refactor to share more code between OpenSSL and NSS implementations.

BUG=245025

Review URL: https://codereview.chromium.org/155623005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251961 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251961