Fix LayoutTableSectionTest test cases which called a method on nil.

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index 2fd321a0a1ac486189759aed0381fb9f22687dce..2932c35f2f8d181185466910993318b36e3d7ce0 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -4119,6 +4119,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "net_unittests"

[Dirk Pranke, 2016/10/27 22:40:59]

Are you intentionally adding net_unittests in this change? Your CL description
doesn't mention it.

[krasin1, 2016/10/27 23:51:29]

Replied out of line.

TL;DR: yes, intentionally; description updated. Thanks!

+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ppapi_unittests"
       },
       {
@@ -4162,6 +4168,12 @@
           "can_use_on_swarming_builders": true
         },
         "test": "url_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "webkit_unit_tests"
       }
     ]
   },
@@ -12194,6 +12206,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "webkit_unit_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "wm_unittests"
       },
       {