Mark pdf filterbitmap images as failure ignored

expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json

Index: expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json
diff --git a/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json b/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json
index d5ede6c082b65607f324b89f7fd3f80f1edf2f79..7326b054d340be51020a38b325a4545da3b708e1 100644
--- a/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json
+++ b/expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json
@@ -7587,24 +7587,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          14334429893464530794
+          4433482584816561150
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_128.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          1927310655351769469
+          18151285181604935806
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_16.png_565.png": {
@@ -7638,24 +7634,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13850073998120863233
+          6146306295800854146
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_16.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3839747123012665825
+          7096762157070022778
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_256.png_565.png": {
@@ -7689,24 +7681,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4392895401814872188
+          14510027605567131533
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_256.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          12289549291038324002
+          15118912166828841078
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_32.png_565.png": {
@@ -7740,24 +7728,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          5388648414377067183
+          8208928573317044223
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_32.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          3005060272187674694
+          11324987060954080537
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_512.png_565.png": {
@@ -7791,24 +7775,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          13071772474452701276
+          6747277782436671035
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_512.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          1866160515636785656
+          13858594519782999967
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_64.png_565.png": {
@@ -7842,24 +7822,20 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          501131417950684828
+          16069558879543136184
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_image_mandrill_64.png_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          7054065765090828569
+          4012798572929329761
         ]
       ], 
-      "bugs": [
-        1578
-      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": false
     }, 
     "filterbitmap_text_10.00pt_565.png": {