Enable cpplint for more webrtc subfolders and fix all uncovered cpplint errors.

This CL enableds cpplint for webrtc/common_video, webrtc/sound and webrtc/tools.

BUG=webrtc:5273

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

Review URL: https://codereview.webrtc.org/1511603004

Cr-Commit-Position: refs/heads/master@{#10967}

PRESUBMIT.py

diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 9747d91..cd356ca 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -18,8 +18,11 @@
 CPPLINT_DIRS = [
   'webrtc/audio',
   'webrtc/call',
+  'webrtc/common_video',
   'webrtc/examples',
   'webrtc/modules/video_processing',
+  'webrtc/sound',
+  'webrtc/tools',
   'webrtc/video',
 ]