Rebaseline imagefiltersscaled GM.

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Release/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9785004568147979273
         ]
       ], 
       "bugs": [
@@ skipping 8275 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "imagefiltersscaled_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15902574037875604957
+          4883484985852481372
         ]
       ]
     }, 
     "imagefiltersscaled_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          17703105217437266490
+          5119548928893938524
         ]
       ]
     }, 
     "imagefiltersscaled_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          17916944577514867175
+          4116288366135835232
         ]
       ]
     }, 
     "imagefiltersscaled_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15651833297939472607
+          3705758857776045239
         ]
       ]
     }, 
     "imagemagnifier_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5994337649189059376
         ]
       ], 
@@ skipping 4747 matching lines @@
           15843716056234692659
         ]
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }
   }
 }