New browser tests for Device Motion/Orientation.

The new browser tests follow the shared memory
implementation and supersede the old test using
IPC messages.

The OrientationTest is currently disabled and
should be enabled once the Blink side switches
to the shared memory implementation for Device
Orientation as well.

BUG=261165
NOTRY=true

Review URL: https://codereview.chromium.org/24565002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225702 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225702