Supply video_decode_accelerator_unittest args in buildbot json

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 1946 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "gl_unittests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--test_video_data=../../media/test/data/test-25fps.h264:320:240:250:258:50:175:1"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "video_decode_accelerator_unittest",
@@ skipping 314 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "tab_capture_end2end_tests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--test_video_data=../../media/test/data/test-25fps.h264:320:240:250:258:50:175:1"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         },
         "test": "video_decode_accelerator_unittest",
@@ skipping 247 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         }
       }
     ]
   }
 }