[Android] Clear gtest app's data on tear down.

build/android/pylib/gtest/test_package_apk.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Defines TestPackageApk to help run APK-based native tests."""
 
 import logging
 import os
 import shlex
 import sys
@@ skipping 69 matching lines @@
     adb.StartActivity(
         self._test_apk_package_name,
         self._test_activity_name,
         wait_for_completion=True,
         action='android.intent.action.MAIN',
         force_stop=True)
 
   #override
   def ClearApplicationState(self, adb):
     adb.ClearApplicationState(self._test_apk_package_name)
+    # Content shell creates a profile on the sdscard which accumulates cache
+    # files over time.
+    if self.suite_name == 'content_browsertests':
+      adb.RunShellCommand(
+          'rm -r %s/content_shell' % adb.GetExternalStorage(),
+          timeout_time=60 * 2)
 
   #override
   def CreateCommandLineFileOnDevice(self, adb, test_filter, test_arguments):
     self._CreateCommandLineFileOnDevice(
         adb, '--gtest_filter=%s %s' % (test_filter, test_arguments))
 
   #override
   def GetAllTests(self, adb):
     self._CreateCommandLineFileOnDevice(adb, '--gtest_list_tests')
     try:
@@ skipping 20 matching lines @@
     finally:
       self.tool.CleanUpEnvironment()
     logfile = android_commands.NewLineNormalizer(sys.stdout)
     return self._WatchFifo(adb, timeout=10, logfile=logfile)
 
   #override
   def Install(self, adb):
     self.tool.CopyFiles()
     adb.ManagedInstall(self.suite_path, False,
                             package_name=self._test_apk_package_name)