Attempt to disable tab_capture_end2end_tests on the trybots.

testing/buildbot/gn_isolate_map.pyl

 ## Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 877 matching lines @@
   },
   "sync_integration_tests": {
     "label": "//chrome/test:sync_integration_tests",
     "type": "windowed_test_launcher",
   },
   "system_webview_apk": {
     "label": "//android_webview:system_webview_apk",
     "type": "additional_compile_target",
   },
   "tab_capture_end2end_tests": {
-    "label": "//chrome/test:browser_tests",
+    # TODO(dpranke), TODO(crbug.com/714336): What is the right label to
+    # have here (and/or the right way to run this?).
+    "label": "//chrome/test:tab_capture_end2end_tests",
     "type": "gpu_browser_test",
     "gtest_filter": "CastStreamingApiTestWithPixelOutput.EndToEnd*:TabCaptureApiPixelTest.EndToEnd*",
   },
   "telemetry_gpu_integration_test": {
     "label": "//chrome/test:telemetry_gpu_integration_test",
     "type": "script",
     "script": "//testing/scripts/run_gpu_integration_test_as_googletest.py",
     "args": [
       "../../content/test/gpu/run_gpu_integration_test.py",
     ],
@@ skipping 215 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/platform/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
 }