clang format

src/core/ext/filters/client_channel/client_channel.c

src/core/ext/filters/client_channel/lb_policy.c

.../filters/client_channel/lb_policy/pick_first/pick_first.c

...ilters/client_channel/lb_policy/round_robin/round_robin.c

src/core/ext/filters/client_channel/resolver.c

src/core/ext/transport/chttp2/transport/chttp2_transport.c

src/core/lib/debug/trace.h

src/core/lib/iomgr/combiner.c

src/core/lib/iomgr/error.c

src/core/lib/iomgr/ev_posix.c

src/core/lib/iomgr/pollset_uv.c

src/core/lib/iomgr/pollset_windows.c

src/core/lib/iomgr/resource_quota.c

src/core/lib/iomgr/timer_generic.c

src/core/lib/iomgr/timer_uv.c

src/core/lib/security/transport/secure_endpoint.c

src/core/lib/surface/call.c

src/core/lib/surface/completion_queue.c

src/core/lib/surface/init.c

src/core/lib/surface/init_secure.c