Convert Top Chrome MD tests to use swarming

testing/buildbot/chromium.gpu.fyi.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)": {},
   "GPU Win x64 Builder": {},
@@ skipping 458 matching lines @@
         "test": "audio_unittests",
         "use_xvfb": false
       },
       {
         "args": [
           "--enable-gpu",
           "--test-launcher-jobs=1",
           "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
         "name": "tab_capture_end2end_tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "browser_tests",
         "use_xvfb": false
       },
       {
         "args": [
           "--use-gpu-in-tests"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ skipping 400 matching lines @@
         "test": "audio_unittests",
         "use_xvfb": false
       },
       {
         "args": [
           "--enable-gpu",
           "--test-launcher-jobs=1",
           "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
         "name": "tab_capture_end2end_tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "browser_tests",
         "use_xvfb": false
       },
       {
         "args": [
           "--use-gpu-in-tests"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ skipping 1628 matching lines @@
         "test": "audio_unittests",
         "use_xvfb": false
       },
       {
         "args": [
           "--enable-gpu",
           "--test-launcher-jobs=1",
           "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
         "name": "tab_capture_end2end_tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "browser_tests",
         "use_xvfb": false
       },
       {
         "args": [
           "--use-gpu-in-tests"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ skipping 7038 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2012ServerR2-SP0"
             }
           ]
         }
       }
     ]
   }
 }