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

tests/selenium/sample_list.txt

 #
 # Test Requirements:
 #
 #   Each sample is expected to have a global variable called g_finished
 #   that is set to true when the sample has finish initalizing and is ready
 #   for a screenshot.
 #
 # Line Format:
 #
 #   TestType test-name options
@@ skipping 54 matching lines @@
 #
 #   pdiff_edge_threshold(0 to 7) : Set edge detect threshold in pdiff.
 #       This threshold indicates the max number of neighbors the pixel can
 #       have to be considered as edge. 0 means only ignore scattered pixels.
 # NOTE! ----------------------------------------------------------------------
 #
 # Read the sample guidelines
 # 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)
 medium  billboards                        screenshot pdiff_threshold(200)
 medium  bitmap-draw-image                 screenshot pdiff_threshold(200)
 medium  canvas                            screenshot pdiff_threshold(200) pdiff_threshold_mac(14600)
 medium  canvas-fonts                      screenshot pdiff_threshold(200) pdiff_threshold_mac(21900)
 medium  canvas-texturedraw
 medium  checkers                          screenshot pdiff_threshold(200)
 medium  convolution                       screenshot pdiff_threshold(200)
@@ skipping 25 matching lines @@
 small   texturesamplers                   screenshot pdiff_threshold_win(1200) pdiff_threshold_mac(32200)
 medium  tutorial-primitive                screenshot pdiff_threshold(200) pdiff_threshold_mac(10400)
 large   vertex-shader                     screenshot timeout(45000) pdiff_threshold(200)  except(*iexplore)
 medium  vertex-shader-animation           screenshot pdiff_threshold(200)
 medium  zsorting                          screenshot(9) pdiff_threshold_win(200) pdiff_threshold_mac(39500)
 # box2d-3d works in browsers but for some reason times out on some configs
 #large   box2d-3d/box2d-3d                timeout(45000) except(*googlechrome)
 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
 #    pdiff_threshold options have any meaning
 
 small   TestSampleErrorTextureSmall       pdiff_threshold(200)
 small   TestSampleHelloCube_TexturesSmall pdiff_threshold(450)
 small   TestSampleRefreshPageLoad_Small
 medium  TestSampleCustomCamera            pdiff_threshold(200) pdiff_threshold_win(200)
 medium  TestSamplePicking
 medium  TestSampleRenderMode
 medium  TestSampleRotateModel             pdiff_threshold(200)
 medium  TestSampleShader_Test             pdiff_threshold(200) pdiff_threshold_win(200)
 large   TestSampleMultipleClientsLarge
 large   TestSamplePingPongLarge
 # This test currently fails on IE as it considers localhost: to be a trusted
 # domain.
 small   TestLoadTextureFromFileSmall      except(*iexplore)