Enable presubmit pylint in build/android.

build/android/pylib/valgrind_tools.py

Index: build/android/pylib/valgrind_tools.py
diff --git a/build/android/pylib/valgrind_tools.py b/build/android/pylib/valgrind_tools.py
index c71b873b67f6754b5c0772be508701ebeaf5eec0..3775bf3a728a11723321c0382297829bc588245c 100644
--- a/build/android/pylib/valgrind_tools.py
+++ b/build/android/pylib/valgrind_tools.py
@@ -25,7 +25,7 @@ import os.path
 import sys
 from glob import glob
 
-from constants import DIR_SOURCE_ROOT
+from pylib.constants import DIR_SOURCE_ROOT
 
 
 def SetChromeTimeoutScale(adb, scale):
@@ -41,6 +41,10 @@ def SetChromeTimeoutScale(adb, scale):
 class BaseTool(object):
   """A tool that does nothing."""
 
+  def __init__(self):
+    """Does nothing."""
+    pass
+
   def GetTestWrapper(self):
     """Returns a string that is to be prepended to the test command line."""
     return ''
@@ -89,6 +93,7 @@ class AddressSanitizerTool(BaseTool):
   WRAPPER_NAME = 'asanwrapper.sh'
 
   def __init__(self, adb):
+    super(AddressSanitizerTool, self).__init__()
     self._adb = adb
     self._wrap_properties = ['wrap.com.google.android.apps.ch',
                              'wrap.org.chromium.native_test',
@@ -147,6 +152,7 @@ class ValgrindTool(BaseTool):
   VGLOGS_DIR = '/data/local/tmp/vglogs'
 
   def __init__(self, adb):
+    super(ValgrindTool, self).__init__()
     self._adb = adb
     # exactly 31 chars, SystemProperties::PROP_NAME_MAX
     self._wrap_properties = ['wrap.com.google.android.apps.ch',
@@ -237,11 +243,11 @@ class TSanTool(ValgrindTool):
 
 
 TOOL_REGISTRY = {
-    'memcheck': lambda x: MemcheckTool(x),
-    'memcheck-renderer': lambda x: MemcheckTool(x),
-    'tsan': lambda x: TSanTool(x),
-    'tsan-renderer': lambda x: TSanTool(x),
-    'asan': lambda x: AddressSanitizerTool(x),
+    'memcheck': MemcheckTool,
+    'memcheck-renderer': MemcheckTool,
+    'tsan': TSanTool,
+    'tsan-renderer': TSanTool,
+    'asan': AddressSanitizerTool,
 }