Run video_decode_accelerator_unittest on windows GPU bots.

testing/buildbot/chromium.gpu.json

 {
   "AAAAA1 AUTOGENERATED FILE DO NOT EDIT": {},
   "AAAAA2 See generate_buildbot_json.py to make changes": {},
   "GPU Linux Builder": {},
   "GPU Linux Builder (dbg)": {},
   "GPU Mac Builder": {},
   "GPU Mac Builder (dbg)": {},
   "GPU Win Builder": {},
   "GPU Win Builder (dbg)": {},
   "Linux Debug (NVIDIA)": {
@@ skipping 1944 matching lines @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "gl_unittests",
         "use_xvfb": false
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:104a",
+              "os": "Windows-2008ServerR2-SP1"
+            }
+          ]
+        },
+        "test": "video_decode_accelerator_unittest",
+        "use_xvfb": false
       }
     ],
     "isolated_scripts": [
       {
         "args": [
           "context_lost",
           "--show-stdout",
           "--browser=debug",
           "-v",
           "--extra-browser-args=--enable-logging=stderr --js-flags=--expose-gc"
@@ skipping 301 matching lines @@
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "tab_capture_end2end_tests",
         "use_xvfb": false
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:104a",
+              "os": "Windows-2008ServerR2-SP1"
+            }
+          ]
+        },
+        "test": "video_decode_accelerator_unittest",
+        "use_xvfb": false
       }
     ],
     "isolated_scripts": [
       {
         "args": [
           "context_lost",
           "--show-stdout",
           "--browser=release",
           "-v",
           "--extra-browser-args=--enable-logging=stderr --js-flags=--expose-gc"
@@ skipping 236 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         }
       }
     ]
   }
 }