Add directory option for JUnit coverage files.

build/android/pylib/junit/test_runner.py

Index: build/android/pylib/junit/test_runner.py
diff --git a/build/android/pylib/junit/test_runner.py b/build/android/pylib/junit/test_runner.py
index 6238fe13927d3187a0718d85fb041e298c0bf658..d6704ee98fd89fe6f2472dff53a03aadf4164d9c 100644
--- a/build/android/pylib/junit/test_runner.py
+++ b/build/android/pylib/junit/test_runner.py
@@ -19,6 +19,7 @@ class JavaTestRunner(object):
     self._sdk_version = args.sdk_version
     self._test_filter = args.test_filter
     self._test_suite = args.test_suite
+    self._coverage_dir = args.coverage_dir
 
   def SetUp(self):
     pass
@@ -39,6 +40,9 @@ class JavaTestRunner(object):
         command.extend(['-runner-filter', self._runner_filter])
       if self._sdk_version:
         command.extend(['-sdk-version', self._sdk_version])
+      if self._coverage_dir:
+        # Prefix of JVM means it is JVM argument, not Jar argument.
+        command.extend(['JVM-Demma.coverage.out.file=' + self._coverage_dir])

[mikecase (-- gone --), 2016/05/09 21:11:46]

Where are the .ec files stored by default?

[jbudorick, 2016/05/09 21:13:40]

checkout root directory

[BigBossZhiling, 2016/05/09 21:14:19]

By default it is saved in src directory.

       return_code = cmd_helper.RunCmd(command)
       results_list = json_results.ParseResultsFromJson(
           json.loads(json_file.read()))