PRESUBMIT: Improve PyLint check and add GN format check.
Add pylintrc file based on
https://code.google.com/p/chromium/codesearch#chromium/src/tools/perf/pylintrc
bit tightened up quite a bit (the one in depot_tools is far
more relaxed).
Remove a few excluded directories from pylint check and fixed/
suppressed all warnings generated.
Add GN format check + formatted all GN files using 'gn format'.
Cleanup redundant rules in tools/PRESUBMIT.py
TESTED=Ran 'git cl presubmit -vv', fixed the PyLint violations.
Ran it again with a modification in webrtc/build/webrtc.gni, formatted
all the GN files and ran it again.
R=henrika@webrtc.org, phoglund@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/50069004
Cr-Commit-Position: refs/heads/master@{#9274}
diff --git a/tools/python_charts/webrtc/__init__.py b/tools/python_charts/webrtc/__init__.py
index c1caaa2..674c80f 100644
--- a/tools/python_charts/webrtc/__init__.py
+++ b/tools/python_charts/webrtc/__init__.py
@@ -5,4 +5,4 @@
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
\ No newline at end of file
+# be found in the AUTHORS file in the root of the source tree.