cros: Update remora prompt messages.

BUG=342535

Review URL: https://codereview.chromium.org/153813003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250470 0039d316-1c4b-4281-b951-d872f2087c98
<webview>: Add UMA when guest starts a drag operation.

BUG=342390
Test=No functional change.

Review URL: https://codereview.chromium.org/159433002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250471 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250471
Enabled by default system's volume adjust sound.

BUG=225886, 313067
TEST=browser_tests:VolumeControllerSoundsTest.*

Review URL: https://codereview.chromium.org/148963008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250472 0039d316-1c4b-4281-b951-d872f2087c98
Add support for embedders to require authentication before autofilling passwords.

Currently, this feature is only supported on Android devices, but this provides
the basic hooks to allow requiring additional auth before providing autofilled
passwords.

BUG=341492

Review URL: https://codereview.chromium.org/159203004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250473 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250473