New fieldtrial configs for D3D11

This supports the new experiment groups here: cl/266241314

Change-Id: Ic6ae049784bcccc602b88028ab67b5f4333d7f99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1779574Reviewed-by: Frank Liberato <liberato@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693954}

testing/variations/fieldtrial_testing_config.json

@@ -1684,14 +1684,14 @@
             ]
         }
     ],
-    "D3D11VideoDecoderWin": [
+    "D3D11VideoDecoder": [
         {
             "platforms": [
                 "windows"
             ],
             "experiments": [
                 {
-                    "name": "D3D11VideoDecoderEnabled",
+                    "name": "V1Enabled",
                     "enable_features": [
                         "D3D11VideoDecoder"
                     ]