Add SetImageData api to chrome.clipboard extension to allow js script to pass the png or jpeg encoded image data in ArrayBuffer to be written on chromeos clipboard.

BUG=150835

TBR=isherman

Review-Url: https://codereview.chromium.org/2379573008
Cr-Commit-Position: refs/heads/master@{#441546}
26 files changed