Enable cpplint for webrtc/video_engine

Enable cpplint and have it use a whitelist that also checks
in subdirectories.

Move the cpplint check so it runs before the pylint check
since that one always run and increases the time to errors
for cpplint.

Fix all cpplint errors in webrtc/video_engine.

BUG=webrtc:5149
TESTED=Fixed issues reported by:
find webrtc/video_engine -type f -name *.cc -o -name *.h | xargs cpplint.py
followed by 'git cl presubmit'.

R=pbos@chromium.org, phoglund@chromium.org
TBR=pbos@webrtc.org, phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/1481723003 .

Cr-Commit-Position: refs/heads/master@{#10808}
diff --git a/webrtc/video_engine/payload_router_unittest.cc b/webrtc/video_engine/payload_router_unittest.cc
index acaa400..11c664b 100644
--- a/webrtc/video_engine/payload_router_unittest.cc
+++ b/webrtc/video_engine/payload_router_unittest.cc
@@ -182,7 +182,7 @@
 
   const uint32_t bitrate_1 = 10000;
   const uint32_t bitrate_2 = 76543;
-  std::vector<uint32_t> bitrates (2, bitrate_1);
+  std::vector<uint32_t> bitrates(2, bitrate_1);
   bitrates[1] = bitrate_2;
   EXPECT_CALL(rtp_1, SetTargetSendBitrate(bitrate_1))
       .Times(1);