cc: Make OutputSurfaceFrame::sub_buffer_rect optional
sub_buffer_rect is used to signal partial or empty swap, but previously
required a default value of full surface size to indicate regular
swap. In preparation for adding swap with content bounds, clarify
the default case to not provide a value for sub_buffer_rect.
BUG=687690
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
Review-Url: https://codereview.chromium.org/2699173002
Cr-Commit-Position: refs/heads/master@{#452234}
11 files changed