Fixed several pylint warnings on Windows.

Review URL: https://codereview.chromium.org/929183002

Cr-Original-Commit-Position: refs/heads/master@{#316527}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a0f67e034ea83f64ba12240176cd6fdd0ac8b878

toolchain/get_concurrent_links.py

@@ -7,6 +7,7 @@
 
 import os
 import re
+import subprocess
 import sys
 
 def GetDefaultConcurrentLinks():
@@ -31,8 +32,7 @@ def GetDefaultConcurrentLinks():
         ("sullAvailExtendedVirtual", ctypes.c_ulonglong),
       ]
 
-    stat = MEMORYSTATUSEX()
-    stat.dwLength = ctypes.sizeof(stat)
+    stat = MEMORYSTATUSEX(dwLength=ctypes.sizeof(MEMORYSTATUSEX))
     ctypes.windll.kernel32.GlobalMemoryStatusEx(ctypes.byref(stat))
 
     mem_limit = max(1, stat.ullTotalPhys / (4 * (2 ** 30)))  # total / 4GB
@@ -55,7 +55,7 @@ def GetDefaultConcurrentLinks():
       # A static library debug build of Chromium's unit_tests takes ~2.7GB, so
       # 4GB per ld process allows for some more bloat.
       return max(1, avail_bytes / (4 * (2 ** 30)))  # total / 4GB
-    except:
+    except Exception:
       return 1
   else:
     # TODO(scottmg): Implement this for other platforms.

toolchain/win/setup_toolchain.py

@@ -8,15 +8,13 @@ import re
 import subprocess
 import sys
 
-"""
-Copies the given "win tool" (which the toolchain uses to wrap compiler
-invocations) and the environment blocks for the 32-bit and 64-bit builds on
-Windows to the build directory.
-
-The arguments are the visual studio install location and the location of the
-win tool. The script assumes that the root build directory is the current dir
-and the files will be written to the current directory.
-"""
+# Copies the given "win tool" (which the toolchain uses to wrap compiler
+# invocations) and the environment blocks for the 32-bit and 64-bit builds on
+# Windows to the build directory.
+#
+# The arguments are the visual studio install location and the location of the
+# win tool. The script assumes that the root build directory is the current dir
+# and the files will be written to the current directory.
 
 
 def _ExtractImportantEnvironment(output_of_set):
@@ -104,7 +102,6 @@ def main():
           '<visual studio path> <win tool path> <win sdk path> '
           '<runtime dirs> <cpu_arch>')
     sys.exit(2)
-  vs_path = sys.argv[1]
   tool_source = sys.argv[2]
   win_sdk_path = sys.argv[3]
   runtime_dirs = sys.argv[4]

vs_toolchain.py

@@ -37,7 +37,6 @@ def SetEnvironmentAndGetRuntimeDllDirs():
 
     toolchain = toolchain_data['path']
     version = toolchain_data['version']
-    version_is_pro = version[-1] != 'e'
     win8sdk = toolchain_data['win8sdk']
     wdk = toolchain_data['wdk']
     # TODO(scottmg): The order unfortunately matters in these. They should be
@@ -168,7 +167,6 @@ def Update():
   if sys.platform in ('win32', 'cygwin') and depot_tools_win_toolchain:
     import find_depot_tools
     depot_tools_path = find_depot_tools.add_depot_tools_to_path()
-    json_data_file = os.path.join(script_dir, 'win_toolchain.json')
     get_toolchain_args = [
         sys.executable,
         os.path.join(depot_tools_path,