Fixing broken images

gm/rebaseline_server/testdata/outputs/expected/compare_to_expectations_test.CompareToExpectationsTest.test_gm/gm.json

 {
   "extraColumnHeaders": {
     "builder": {
       "headerText": "builder", 
       "isFilterable": true, 
       "isSortable": true, 
       "useFreeformFilter": true, 
       "valuesAndCounts": [
         [
           "Test-Android-GalaxyNexus-SGX540-Arm7-Release", 
@@ skipping 102 matching lines @@
       ]
     }
   }, 
   "extraColumnOrder": [
     "resultType", 
     "builder", 
     "test", 
     "config"
   ], 
   "header": {
-    "dataHash": "-7804718549064096650", 
+    "dataHash": "6366271140430198826", 
     "isEditable": false, 
     "isExported": true, 
     "schemaVersion": 5, 
     "timeNextUpdateAvailable": null, 
     "timeUpdated": 12345678, 
     "type": "all"
   }, 
   "imagePairs": [
     {
       "differenceData": {
+        "diffUrl": "bitmap-64bitMD5_texdata_2736593828543197285_png_png-vs-bitmap-64bitMD5_texdata_3695033638604474475_png_png.png", 
         "maxDiffPerChannel": [
           128, 
           128, 
           128
         ], 
         "numDifferingPixels": 120000, 
         "percentDifferingPixels": 75.0, 
-        "perceptualDifference": 50.122499
+        "perceptualDifference": 50.122499, 
+        "whiteDiffUrl": "bitmap-64bitMD5_texdata_2736593828543197285_png_png-vs-bitmap-64bitMD5_texdata_3695033638604474475_png_png.png"
       }, 
       "expectations": {
         "bugs": null, 
         "ignore-failure": false, 
         "reviewed-by-human": null
       }, 
       "extraColumns": {
         "builder": "Test-Android-GalaxyNexus-SGX540-Arm7-Release", 
         "config": "gpu", 
         "resultType": "failed", 
         "test": "texdata"
       }, 
       "imageAUrl": "bitmap-64bitMD5/texdata/2736593828543197285.png", 
       "imageBUrl": "bitmap-64bitMD5/texdata/3695033638604474475.png", 
       "isDifferent": true
     }, 
     {
       "differenceData": {
+        "diffUrl": "bitmap-64bitMD5_filterbitmap_checkerboard_192_192_9917960313903939620_png_png-vs-bitmap-64bitMD5_filterbitmap_checkerboard_192_192_4719210487426381700_png_png.png", 
         "maxDiffPerChannel": [
           255, 
           255, 
           255
         ], 
         "numDifferingPixels": 765891, 
         "percentDifferingPixels": 97.38807678222656, 
-        "perceptualDifference": 25.256985
+        "perceptualDifference": 25.256985, 
+        "whiteDiffUrl": "bitmap-64bitMD5_filterbitmap_checkerboard_192_192_9917960313903939620_png_png-vs-bitmap-64bitMD5_filterbitmap_checkerboard_192_192_4719210487426381700_png_png.png"
       }, 
       "expectations": {
         "bugs": [
           1578
         ], 
         "ignore-failure": null, 
         "reviewed-by-human": false
       }, 
       "extraColumns": {
         "builder": "Test-Android-GalaxyNexus-SGX540-Arm7-Release", 
         "config": "565", 
         "resultType": "failure-ignored", 
         "test": "filterbitmap_checkerboard_192_192"
       }, 
       "imageAUrl": "bitmap-64bitMD5/filterbitmap_checkerboard_192_192/9917960313903939620.png", 
       "imageBUrl": "bitmap-64bitMD5/filterbitmap_checkerboard_192_192/4719210487426381700.png", 
       "isDifferent": true
     }, 
     {
       "differenceData": {
+        "diffUrl": "bitmap-64bitMD5_filterbitmap_checkerboard_192_192_9917960313903939620_png_png-vs-bitmap-64bitMD5_filterbitmap_checkerboard_192_192_3154864687054945306_png_png.png", 
         "maxDiffPerChannel": [
           255, 
           255, 
           255
         ], 
         "numDifferingPixels": 422432, 
         "percentDifferingPixels": 53.715006510416664, 
-        "perceptualDifference": 25.120543999999995
+        "perceptualDifference": 25.120543999999995, 
+        "whiteDiffUrl": "bitmap-64bitMD5_filterbitmap_checkerboard_192_192_9917960313903939620_png_png-vs-bitmap-64bitMD5_filterbitmap_checkerboard_192_192_3154864687054945306_png_png.png"
       }, 
       "expectations": {
         "bugs": [
           1578
         ], 
         "ignore-failure": null, 
         "reviewed-by-human": false
       }, 
       "extraColumns": {
         "builder": "Test-Android-GalaxyNexus-SGX540-Arm7-Release", 
@@ skipping 425 matching lines @@
     "imageB": {
       "baseUrl": "http://chromium-skia-gm.commondatastorage.googleapis.com/gm", 
       "description": "actual image"
     }, 
     "whiteDiffs": {
       "baseUrl": "/static/generated-images/whitediffs", 
       "description": "differing pixels in white"
     }
   }
 }