Print Preview: Add option to rasterize PDFs and add JPEG compression.

Add checkbox to print preview to select rasterized PDF output. When
selected, PDF will be rasterized and printed as a series of images.
Images will be JPEG encoded.

Preliminary design doc: https://docs.google.com/a/google.com/document/d/1UTzurMuPeRgx2PcnTMuAq5iM5_R2QBNGp-9lzgtwT2k/edit?usp=sharing

Depends on http://crrev.com/2529543003

Linked to launch bug, should also resolve 534945,550205,480628

BUG=675798
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2524143003
Cr-Commit-Position: refs/heads/master@{#440897}
31 files changed