Fix windows margin scaling bug

Fix windows margin scaling bug

When printing to local printers Windows uses the computed page size.
Page size is scaled when using print scaling to force blink to reflow
the page. Need to unscale the page size before sending it back to
Windows so that Windows knows the correct page size.

BUG=686384
Review-Url: https://codereview.chromium.org/2667793002
Cr-Commit-Position: refs/heads/master@{#447647}
(cherry picked from commit 8f96566d8d7d712d4d11ca04e4f3641048362276)

Review-Url: https://codereview.chromium.org/2674913004 .
Cr-Commit-Position: refs/branch-heads/2987@{#305}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/97411fe06ea6c9f953b5944b73eb7920999df16b

[rbpotter, 2017-02-03 23:04:50]

Description was changed from

==========
Fix windows margin scaling bug

When printing to local printers Windows uses the computed page size.
Page size is scaled when using print scaling to force blink to reflow
the page. Need to unscale the page size before sending it back to
Windows so that Windows knows the correct page size.

BUG=686384

Review-Url: https://codereview.chromium.org/2667793002
Cr-Commit-Position: refs/heads/master@{#447647}
(cherry picked from commit 8f96566d8d7d712d4d11ca04e4f3641048362276)
==========

to

==========
Fix windows margin scaling bug

When printing to local printers Windows uses the computed page size.
Page size is scaled when using print scaling to force blink to reflow
the page. Need to unscale the page size before sending it back to
Windows so that Windows knows the correct page size.

BUG=686384

Review-Url: https://codereview.chromium.org/2667793002
Cr-Commit-Position: refs/heads/master@{#447647}
(cherry picked from commit 8f96566d8d7d712d4d11ca04e4f3641048362276)

Review-Url: https://codereview.chromium.org/2674913004 .
Cr-Commit-Position: refs/branch-heads/2987@{#305}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/97411fe06ea6c9f953b5944b73eb...
==========

[rbpotter, 2017-02-03 23:04:53]

Committed patchset #1 (id:1) manually as
97411fe06ea6c9f953b5944b73eb7920999df16b.