Field trial config for compositor priority experiment.

Bug: 966177, 1027606
Change-Id: I335d1df534ff7a7baafac89f6e0c8d034fc061d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947399Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Katie Dillon <kdillon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721198}

testing/variations/fieldtrial_testing_config.json

@@ -1360,6 +1360,28 @@
             ]
         }
     ],
+    "BlinkSchedulerVeryHighPriorityForCompositingExperiments": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "VeryHighPriorityForCompositingAfterDelay100",
+                    "params": {
+                        "CompositingDelayLength": "100"
+                    },
+                    "enable_features": [
+                        "BlinkSchedulerVeryHighPriorityForCompositingAfterDelay"
+                    ]
+                }
+            ]
+        }
+    ],
     "BlockPromptsIfIgnoredOften": [
         {
             "platforms": [