Added GLib/DBus workaround to runtest.py under --do-dbus-workaround option.

scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json

Index: scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json
diff --git a/scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json b/scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json
index 0cf9756c5c607fada9c235a49542442421d6275b..cf5a6e263c71f710aae12f41d92ae1db2e45b42a 100644
--- a/scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json
+++ b/scripts/slave/recipes/gpu.expected/linux_debug_tryserver.json
@@ -134,6 +134,7 @@
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "--spawn-dbus",
       "content_gl_tests"
     ],
     "name": "content_gl_tests"
@@ -153,6 +154,7 @@
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "--spawn-dbus",
       "gles2_conform_test"
     ],
     "name": "gles2_conform_test"
@@ -172,6 +174,7 @@
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
       "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Debug\", \"buildername\": \"TestBuilder\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"chromium.testing.master\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"gpu\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": \"HEAD\", \"rietveld\": \"https://codereview.chromium.org\", \"root\": \"src\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "--spawn-dbus",
       "gl_tests"
     ],
     "name": "gl_tests"
@@ -198,6 +201,7 @@
       "--results-directory=[SLAVE_BUILD]/gtest-results/content_browsertests",
       "--build-number=571",
       "--builder-name=TestBuilder",
+      "--spawn-dbus",
       "content_browsertests",
       "--use-gpu-in-tests",
       "--gtest_filter=Gpu*.*",
@@ -229,6 +233,7 @@
       "--build-number=571",
       "--builder-name=TestBuilder",
       "--run-python-script",
+      "--spawn-dbus",
       "[SLAVE_BUILD]/src/content/test/gpu/run_gpu_test",
       "pixel_test",
       "--show-stdout",
@@ -283,6 +288,7 @@
       "--build-number=571",
       "--builder-name=TestBuilder",
       "--run-python-script",
+      "--spawn-dbus",
       "[SLAVE_BUILD]/src/content/test/gpu/run_gpu_test",
       "webgl_conformance",
       "--show-stdout",
@@ -318,6 +324,7 @@
       "--build-number=571",
       "--builder-name=TestBuilder",
       "--run-python-script",
+      "--spawn-dbus",
       "[SLAVE_BUILD]/src/content/test/gpu/run_gpu_test",
       "context_lost",
       "--show-stdout",
@@ -352,6 +359,7 @@
       "--build-number=571",
       "--builder-name=TestBuilder",
       "--run-python-script",
+      "--spawn-dbus",
       "[SLAVE_BUILD]/src/content/test/gpu/run_gpu_test",
       "memory_test",
       "--show-stdout",