Add text blob gm baselines.

Review URL: https://codereview.chromium.org/504203002
diff --git a/expectations/gm/Test-ChromeOS-Alex-GMA3150-x86-Debug/expected-results.json b/expectations/gm/Test-ChromeOS-Alex-GMA3150-x86-Debug/expected-results.json
index 3206ce4..3d295d3 100644
--- a/expectations/gm/Test-ChromeOS-Alex-GMA3150-x86-Debug/expected-results.json
+++ b/expectations/gm/Test-ChromeOS-Alex-GMA3150-x86-Debug/expected-results.json
@@ -5942,6 +5942,24 @@
       ], 
       "reviewed-by-human": false
     }, 
+    "textblob_565.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          11990750039619298194
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
+    "textblob_8888.png": {
+      "allowed-digests": [
+        [
+          "bitmap-64bitMD5", 
+          3499763660998801760
+        ]
+      ], 
+      "reviewed-by-human": true
+    }, 
     "texteffects_565.png": {
       "allowed-digests": [
         [