[pyauto] Force plugin load at startup

chrome/test/pyautolib/pyauto.py

Index: chrome/test/pyautolib/pyauto.py
diff --git a/chrome/test/pyautolib/pyauto.py b/chrome/test/pyautolib/pyauto.py
index 8f15d5dca1b483d6973ebf10184248ef5f789e7a..58714d987eee52913baee6d7a180484626ad08b8 100755
--- a/chrome/test/pyautolib/pyauto.py
+++ b/chrome/test/pyautolib/pyauto.py
@@ -194,6 +194,12 @@ class PyUITest(pyautolib.PyUITestBase, unittest.TestCase):
     # on ChromeOS).
     self.SetUp()
 
+    # Forcibly trigger all plugins to get registered.  crbug.com/94123
+    # Sometimes flash files loaded too quickly after firing browser
+    # ends up getting downloaded, which seems to indicate that the plugin
+    # hasn't been registered yet.
+    self.GetPluginsInfo()
+
     # TODO(dtu): Remove this after crosbug.com/4558 is fixed.
     if self.IsChromeOS():
       self.WaitUntil(lambda: not self.GetNetworkInfo()['offline_mode'])