Make tab_capture_end2end_tests work as a regular windowed_test_launcher.

testing/buildbot/chromium.gpu.json

Index: testing/buildbot/chromium.gpu.json
diff --git a/testing/buildbot/chromium.gpu.json b/testing/buildbot/chromium.gpu.json
index 1d7cd34e7e34e2dcb4a234fb1698e2ecfabd7515..4d562ae7f98dc7ca46c8e17732b9d951cf881ce8 100644
--- a/testing/buildbot/chromium.gpu.json
+++ b/testing/buildbot/chromium.gpu.json
@@ -347,8 +347,13 @@
       },
       {
         "args": [
-          "--use-gpu-in-tests"
+          "--enable-gpu",
+          "--test-launcher-bot-mode",
+          "--test-launcher-jobs=1",
+          "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*",
+          "--no-xvfb"
         ],
+        "name": "tab_capture_end2end_tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -358,7 +363,7 @@
             }
           ]
         },
-        "test": "gl_tests",
+        "test": "browser_tests",
         "use_xvfb": false
       },
       {
@@ -374,10 +379,13 @@
             }
           ]
         },
-        "test": "gl_unittests",
+        "test": "gl_tests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--use-gpu-in-tests"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -387,7 +395,7 @@
             }
           ]
         },
-        "test": "tab_capture_end2end_tests",
+        "test": "gl_unittests",
         "use_xvfb": false
       }
     ],
@@ -998,8 +1006,12 @@
       },
       {
         "args": [
-          "--use-gpu-in-tests"
+          "--enable-gpu",
+          "--test-launcher-bot-mode",
+          "--test-launcher-jobs=1",
+          "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
+        "name": "tab_capture_end2end_tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -1009,7 +1021,7 @@
             }
           ]
         },
-        "test": "gl_tests",
+        "test": "browser_tests",
         "use_xvfb": false
       },
       {
@@ -1025,10 +1037,13 @@
             }
           ]
         },
-        "test": "gl_unittests",
+        "test": "gl_tests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--use-gpu-in-tests"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -1038,7 +1053,7 @@
             }
           ]
         },
-        "test": "tab_capture_end2end_tests",
+        "test": "gl_unittests",
         "use_xvfb": false
       }
     ],
@@ -1663,8 +1678,12 @@
       },
       {
         "args": [
-          "--use-gpu-in-tests"
+          "--enable-gpu",
+          "--test-launcher-bot-mode",
+          "--test-launcher-jobs=1",
+          "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
+        "name": "tab_capture_end2end_tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -1675,7 +1694,7 @@
             }
           ]
         },
-        "test": "gl_tests",
+        "test": "browser_tests",
         "use_xvfb": false
       },
       {
@@ -1692,10 +1711,13 @@
             }
           ]
         },
-        "test": "gl_unittests",
+        "test": "gl_tests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--use-gpu-in-tests"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -1706,7 +1728,7 @@
             }
           ]
         },
-        "test": "tab_capture_end2end_tests",
+        "test": "gl_unittests",
         "use_xvfb": false
       }
     ],
@@ -2346,8 +2368,12 @@
       },
       {
         "args": [
-          "--use-gpu-in-tests"
+          "--enable-gpu",
+          "--test-launcher-bot-mode",
+          "--test-launcher-jobs=1",
+          "--gtest_filter=CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*"
         ],
+        "name": "tab_capture_end2end_tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -2357,7 +2383,7 @@
             }
           ]
         },
-        "test": "gl_tests",
+        "test": "browser_tests",
         "use_xvfb": false
       },
       {
@@ -2373,10 +2399,13 @@
             }
           ]
         },
-        "test": "gl_unittests",
+        "test": "gl_tests",
         "use_xvfb": false
       },
       {
+        "args": [
+          "--use-gpu-in-tests"
+        ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
@@ -2386,7 +2415,7 @@
             }
           ]
         },
-        "test": "tab_capture_end2end_tests",
+        "test": "gl_unittests",
         "use_xvfb": false
       },
       {