Reland of PyLint fixes for tools-webrtc and webrtc/tools

tools-webrtc/get_landmines.py

Index: tools-webrtc/get_landmines.py
diff --git a/tools-webrtc/get_landmines.py b/tools-webrtc/get_landmines.py
index d2087bb8f2b0788ef5bb6595123cfca1de529892..4786ec4a01232ec79561ae50e845e38214b10f90 100755
--- a/tools-webrtc/get_landmines.py
+++ b/tools-webrtc/get_landmines.py
@@ -15,19 +15,16 @@ This file emits the list of reasons why a particular build needs to be clobbered
 import os
 import sys
 
-script_dir = os.path.dirname(os.path.realpath(__file__))
-checkout_root = os.path.abspath(os.path.join(script_dir, os.pardir))
-sys.path.insert(0, os.path.join(checkout_root, 'build'))
+SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
+CHECKOUT_ROOT = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir))
+sys.path.insert(0, os.path.join(CHECKOUT_ROOT, 'build'))
 import landmine_utils
 
 
-distributor = landmine_utils.distributor
-gyp_defines = landmine_utils.gyp_defines
-gyp_msvs_version = landmine_utils.gyp_msvs_version
-platform = landmine_utils.platform
+platform = landmine_utils.platform  # pylint: disable=invalid-name
 
 
-def print_landmines():
+def print_landmines():  # pylint: disable=invalid-name
   """
   ALL LANDMINES ARE EMITTED FROM HERE.
   """