Files.app: Adjust tab index for the save file diaog.

In the save file dialog, the file name input has a initial focus.  Previously,
the file name input has a tabindex=10, and when the focus goes back to the
document, it moves to the file name input again because of the refocus method of
Filemanager class.

This CL change the tabindex of elements on the save-as dialog's footer and allow
users to explorer all controls in Files.app.

BUG=332051
TEST=manually

Review URL: https://codereview.chromium.org/127843002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243859 0039d316-1c4b-4281-b951-d872f2087c98
Removal of GetDefaultProfile from UserManagerImpl

BUG=322682
TEST=covered by existing unit tests

Review URL: https://codereview.chromium.org/127963004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243860 0039d316-1c4b-4281-b951-d872f2087c98
Telemetry: Add speed parameters to swipe and scroll actions.

The synthetic swipe and scroll gestures have a parameter that controls the speed
of the gesture (in pixels per second). This patch exposes that parameter to the
corresponding page actions in Telemetry.

BUG=326522

Review URL: https://codereview.chromium.org/128073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243861 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243860
SVN changes up to revision 243861