a771bf8ee8
Clang warns if there are missing braces around a subobject
initializer. The most common idiom that triggers this is:
STRUCT s = {0};
if the first field of STRUCT is itself a struct. This can
be more simply written as:
STRUCT s = {};
which also prevents the warning from firing.
Other instances of the warning have been fixed by adding
braces where appropriate.
BUG=505297
TBR=jiayl@webrtc.org
Review URL: https://codereview.webrtc.org/1216353002
Cr-Commit-Position: refs/heads/master@{#9529}