Change the params for the 2d and googleIO samples to cope with slight renderi...

tests/selenium/sample_list.txt

Index: tests/selenium/sample_list.txt
===================================================================
--- tests/selenium/sample_list.txt	(revision 25655)
+++ tests/selenium/sample_list.txt	(working copy)
@@ -72,7 +72,7 @@
 # http://wiki.corp.google.com/twiki/bin/view/Main/ClientThreeDSampleGuidelines
 #
 #
-medium  2d                                screenshot pdiff_threshold(200) pdiff_threshold_mac(41200) colorfactor(0.8)
+medium  2d                                screenshot pdiff_threshold(200) pdiff_threshold_mac(41200) colorfactor(0.8) downsample(1)
 medium  animation
 large   animated-scene                    screenshot timeout(45000) pdiff_threshold(200)
 large   beachdemo/beachdemo               screenshot timeout(120000) pdiff_threshold(200) pdiff_threshold_mac(2100) downsample(1) except(*iexplore, *googlechrome)
@@ -118,7 +118,7 @@
 large   simpleviewer/simpleviewer         screenshot pdiff_threshold(100)
 large   trends/trends                     timeout(30000)
 medium  GoogleIO-2009/step09ex            screenshot pdiff_threshold(200)
-large   GoogleIO-2009/step14ex            screenshot pdiff_threshold(200) timeout(45000)
+large   GoogleIO-2009/step14ex            screenshot pdiff_threshold(200) timeout(45000) downsample(1)
 
 # -- tests below this line are tests for which there is a python
 #    function to custom run the test. As such, only the 'except' and