Merge: Block nested system print dialogs on Windows.
Browser needs to allow nested tasks to update backgroud tabs.
If rendered requests new system dialog, asan build crashes in COMDLG32.dll
NOTRY=true
BUG=451753
Review URL: https://codereview.chromium.org/934393003
Cr-Commit-Position: refs/heads/master@{#317611}
(cherry picked from commit a58ec6a8c37ed1146206c2e4143b58249bdf5255)
Conflicts:
printing/printing_context_win.cc
R=alekseys@chromium.org
Review URL: https://codereview.chromium.org/947223003
Cr-Commit-Position: refs/branch-heads/2272@{#365}
Cr-Branched-From: 827a380cfdb31aa54c8d56e63ce2c3fd8c3ba4d4-refs/heads/master@{#310958}
Review URL: https://codereview.chromium.org/947223003
Cr-Commit-Position: refs/branch-heads/2272@{#366}
Cr-Branched-From: 827a380cfdb31aa54c8d56e63ce2c3fd8c3ba4d4-refs/heads/master@{#310958}
2 files changed
