[Android] Upstream android lint script and run it on debug builders.

build/android/buildbot/bb_host_steps.py

Index: build/android/buildbot/bb_host_steps.py
diff --git a/build/android/buildbot/bb_host_steps.py b/build/android/buildbot/bb_host_steps.py
index cf506aea2a296c28f0639a22eca0b37c76766fb3..7814970ea86b4864ec2de2bc6e0fa4a667ec5ddc 100755
--- a/build/android/buildbot/bb_host_steps.py
+++ b/build/android/buildbot/bb_host_steps.py
@@ -14,7 +14,7 @@ from pylib import constants
 
 
 SLAVE_SCRIPTS_DIR = os.path.join(bb_utils.BB_BUILD_DIR, 'scripts', 'slave')
-VALID_HOST_TESTS = set(['check_webview_licenses', 'findbugs'])
+VALID_HOST_TESTS = set(['check_webview_licenses', 'findbugs', 'lint'])
 EXPERIMENTAL_TARGETS = ['android_experimental']
 
 DIR_BUILD_ROOT = os.path.dirname(constants.DIR_SOURCE_ROOT)
@@ -98,6 +98,14 @@ def FindBugs(options):
       'run_findbugs_plugin_tests.py')] + build_type)
 
 
+def Lint(options):
+  bb_annotations.PrintNamedStep('lint')
+  build_type = []
+  if options.target == 'Release':
+    build_type = ['--release']
+  RunCmd([SrcPath('build', 'android', 'lint.py')] + build_type)
+
+
 def BisectPerfRegression(_):
   RunCmd([SrcPath('tools', 'prepare-bisect-perf-regression.py'),
           '-w', os.path.join(constants.DIR_SOURCE_ROOT, os.pardir)])
@@ -112,6 +120,7 @@ def GetHostStepCmds():
       ('check_webview_licenses', CheckWebViewLicenses),
       ('bisect_perf_regression', BisectPerfRegression),
       ('findbugs', FindBugs),
+      ('lint', Lint),
       ('zip_build', ZipBuild)
   ]