Write skimage output to checksum filenames.

slave/skia_slave_scripts/run_decoding_tests.py

Index: slave/skia_slave_scripts/run_decoding_tests.py
diff --git a/slave/skia_slave_scripts/run_decoding_tests.py b/slave/skia_slave_scripts/run_decoding_tests.py
index 1dc204c369a84b8f88c7862200ae8812a55ec186..b1dc8bff1f89792cec1005dd9bce9c420443cb4a 100644
--- a/slave/skia_slave_scripts/run_decoding_tests.py
+++ b/slave/skia_slave_scripts/run_decoding_tests.py
@@ -14,7 +14,8 @@ import sys
 
 class RunDecodingTests(BuildStep):
   def _Run(self):
-    cmd = ['-r', self._device_dirs.SKImageInDir(), '--noreencode']
+    cmd = ['-r', self._device_dirs.SKImageInDir(), '--noreencode',
+           '--writeChecksumBasedFilenames', '--config', '8888']
 
     # Read expectations, which were downloaded/copied to the device.
     # If this bot is a trybot, read the expected results of the waterfall bot.
@@ -36,8 +37,11 @@ class RunDecodingTests(BuildStep):
 
     cmd.extend(['--createExpectationsPath', output_expectations_file])
 
-    # Draw any mismatches to the same folder as the output json.
-    cmd.extend(['--mismatchPath', self._device_dirs.SKImageOutDir()])
+    # Draw any mismatches to a folder inside SKImageOutDir.
+    image_out_dir = self._flavor_utils.DevicePathJoin(
+        self._device_dirs.SKImageOutDir(), 'images')
+    self._flavor_utils.CreateCleanDeviceDirectory(image_out_dir)
+    cmd.extend(['--mismatchPath', image_out_dir])
 
     self._flavor_utils.RunFlavoredCmd('skimage', cmd)