Pass regenerate-goldens flag through to Java.

build/android/test_runner.py

Index: build/android/test_runner.py
diff --git a/build/android/test_runner.py b/build/android/test_runner.py
index 0fb133cc5ddb82d7de0cdab3285c8144087907b4..6ec8a6603702d17b7798db907b6eaaf59f74926d 100755
--- a/build/android/test_runner.py
+++ b/build/android/test_runner.py
@@ -422,6 +422,11 @@ def AddInstrumentationTestOptions(parser):
                      help='StrictMode command-line flag set on the device, '
                           'death/testing to kill the process, off to stop '
                           'checking, flash to flash only. Default testing.')
+  group.add_argument('--regenerate-goldens', dest='regenerate_goldens',
+                     action='store_true',
+                     help='Causes the render tests to not fail when a check'
+                          'fails or the golden image is missing but to render'
+                          'the view and carry on.')
 
   AddCommonOptions(parser)
   AddDeviceOptions(parser)