Rebase a few GMs and remove some tests from ignored-tests.txt

expectations/gm/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 7199 matching lines @@
           "bitmap-64bitMD5", 
           11293806862486787976
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_checkerboard_high_512_256_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13447447689608543204
+          296179642722990434
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_checkerboard_high_512_256_8888-pipe cross-process.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9122796611608409641
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_checkerboard_high_512_256_8888-serialize.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           9122796611608409641
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_checkerboard_high_512_256_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          15602323353983157176
+          6998570850154406591
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_checkerboard_high_512_256_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5277999924748275029
         ]
@@ skipping 276 matching lines @@
           "bitmap-64bitMD5", 
           6090416266698448089
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_image_high_mandrill_512.png_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4276981932731074819
+          6090416266698448089
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "downsamplebitmap_image_high_mandrill_512.png_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           5006319602237852337
         ]
@@ skipping 11976 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           14883391086059083985
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }