reraiser_thread: Use func.__name__ for thread names

build/android/devil/utils/reraiser_thread.py

Index: build/android/devil/utils/reraiser_thread.py
diff --git a/build/android/devil/utils/reraiser_thread.py b/build/android/devil/utils/reraiser_thread.py
index 964593b5f348b74665abf8fc01d748a8253db21a..e108fc754fbe9befd62c25dfe1e68f97ef071161 100644
--- a/build/android/devil/utils/reraiser_thread.py
+++ b/build/android/devil/utils/reraiser_thread.py
@@ -49,6 +49,8 @@ class ReraiserThread(threading.Thread):
       kwargs: dictionary of keyword arguments for callable, defaults to empty.
       name: thread name, defaults to Thread-N.
     """
+    if not name and func.__name__ != '<lambda>':
+      name = func.__name__
     super(ReraiserThread, self).__init__(name=name)
     if not args:
       args = []