WebUSB: Create a requestDevice method separate from getDevice.

This change reflects an update I just made to the spec to define a
separate requestDevice() method that prompts the user to select a single
device vs. getDevices() that returns the devices the origin currently
has access to.

BUG=492204

Review URL: https://codereview.chromium.org/1288793003

git-svn-id: svn://svn.chromium.org/blink/trunk@200433 bbb929c8-8fbe-4397-9dbb-9b2b20218538
9 files changed
tree: dca94c177ca857fafcacc4eebf52eb48d58fe00f
  1. third_party/