Add GN (the build tool) to the chromium.linux buildbots and try jobs

scripts/slave/recipes/chromium_trybot.expected/unittest_should_run_gn_compile_failure.json

 [
   {
     "abort_on_failure": false,
     "can_fail_build": false,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "config",
       "--spec",
@@ skipping 17 matching lines @@
     "abort_on_failure": false,
     "can_fail_build": false,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "sync",
       "--nohooks",
       "--delete_unversioned_trees",
       "--force",
+      "--revision",
+      "src@HEAD",
       "--output-json",
       "/path/to/tmp/json"
     ],
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"solutions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"src/\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"revision\": 170242@@@",
       "@@@STEP_LOG_LINE@json.output@    }, @@@",
@@ skipping 62 matching lines @@
   {
     "abort_on_failure": false,
     "can_fail_build": false,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "env": {
-      "GYP_DEFINES": "component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
+      "GYP_DEFINES": "component=shared_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
     "name": "gclient runhooks"
   },
   {
     "abort_on_failure": false,
     "can_fail_build": false,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/compile.py",
       "--target",
-      "Release",
+      "Debug",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]/goma",
       "--",
       "base_unittests",
@@ skipping 15 matching lines @@
       "sql_unittests",
       "sync_unit_tests",
       "ui_unittests",
       "unit_tests",
       "browser_tests",
       "content_browsertests",
       "interactive_ui_tests",
       "sync_integration_tests",
       "chrome"
     ],
-    "name": "compile (with patch)",
+    "name": "compile (with patch)"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[DEPOT_TOOLS]/gn.py",
+      "--root=[SLAVE_BUILD]/src",
+      "gen",
+      "//out/Debug_gn",
+      "--args=is_debug=true"
+    ],
+    "name": "gn"
+  },
+  {
+    "cmd": [
+      "[DEPOT_TOOLS]/ninja",
+      "-C",
+      "[SLAVE_BUILD]/src/out/Debug_gn"
+    ],
+    "name": "compile (gn with patch)",
     "~followup_annotations": [
       "step returned non-zero exit code: 1",
       "@@@STEP_FAILURE@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "config",
       "--spec",
       "cache_dir = None\nsolutions = [{'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'safesync_url': 'https://build.chromium.org/p/chromium/lkcr-status/lkgr', 'url': 'svn://svn-mirror.golo.chromium.org/chrome/trunk/src'}]"
     ],
-    "name": "gclient setup (2)"
+    "name": "gclient setup (2)",
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/gclient_safe_revert.py",
       ".",
       "[DEPOT_TOOLS]/gclient"
     ],
-    "name": "gclient revert (2)"
+    "name": "gclient revert (2)",
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "sync",
       "--nohooks",
       "--delete_unversioned_trees",
       "--force",
+      "--revision",
+      "src@HEAD",
       "--output-json",
       "/path/to/tmp/json"
     ],
     "name": "gclient sync (2)",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"solutions\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 170242@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/native_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 274981@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/third_party/WebKit/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 124383@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/third_party/webrtc/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 120644@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/tools/swarm_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 200767@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/tools/swarming_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 276089@@@",
-      "@@@STEP_LOG_LINE@json.output@    }@@@",
-      "@@@STEP_LOG_LINE@json.output@  }@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@",
-      "@@@SET_BUILD_PROPERTY@got_nacl_revision@274981@@@",
-      "@@@SET_BUILD_PROPERTY@got_webkit_revision@124383@@@",
-      "@@@SET_BUILD_PROPERTY@got_swarming_client_revision@276089@@@",
-      "@@@SET_BUILD_PROPERTY@got_webrtc_revision@120644@@@",
-      "@@@SET_BUILD_PROPERTY@got_revision@170242@@@",
-      "@@@SET_BUILD_PROPERTY@got_swarm_client_revision@200767@@@"
-    ]
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/apply_issue.py",
       "-r",
       "[SLAVE_BUILD]/src",
       "-i",
       "12853011",
       "-p",
       "1",
       "-s",
       "https://codereview.chromium.org",
       "--no-auth"
     ],
-    "name": "apply_issue (2)"
+    "name": "apply_issue (2)",
+    "skip": true
   },
   {
     "abort_on_failure": false,
     "can_fail_build": false,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/compile.py",
       "--target",
-      "Release",
+      "Debug",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]/goma",
       "--clobber",
       "--",
@@ skipping 17 matching lines @@
       "sync_unit_tests",
       "ui_unittests",
       "unit_tests",
       "browser_tests",
       "content_browsertests",
       "interactive_ui_tests",
       "sync_integration_tests",
       "chrome"
     ],
     "name": "compile (with patch, lkcr, clobber)",
-    "~followup_annotations": [
-      "step returned non-zero exit code: 1",
-      "@@@STEP_FAILURE@@@"
-    ]
+    "skip": true
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, shutil, sys\nfor p in [os.path.join(sys.argv[1], x) for x in os.listdir(sys.argv[1])]:\n  if os.path.isdir(p):\n    shutil.rmtree(p)\n  else:\n    os.unlink(p)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "rmcontents slave build directory",
     "seed_steps": [
       "rmcontents slave build directory",
       "gclient setup (3)"
     ],
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@python.inline@@@@",
-      "@@@STEP_LOG_LINE@python.inline@import os, shutil, sys@@@",
-      "@@@STEP_LOG_LINE@python.inline@for p in [os.path.join(sys.argv[1], x) for x in os.listdir(sys.argv[1])]:@@@",
-      "@@@STEP_LOG_LINE@python.inline@  if os.path.isdir(p):@@@",
-      "@@@STEP_LOG_LINE@python.inline@    shutil.rmtree(p)@@@",
-      "@@@STEP_LOG_LINE@python.inline@  else:@@@",
-      "@@@STEP_LOG_LINE@python.inline@    os.unlink(p)@@@",
-      "@@@STEP_LOG_END@python.inline@@@"
-    ]
+    "skip": true
   },
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "config",
       "--spec",
       "cache_dir = None\nsolutions = [{'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'safesync_url': 'https://build.chromium.org/p/chromium/lkcr-status/lkgr', 'url': 'svn://svn-mirror.golo.chromium.org/chrome/trunk/src'}]"
     ],
-    "name": "gclient setup (3)"
+    "name": "gclient setup (3)",
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "sync",
       "--nohooks",
       "--delete_unversioned_trees",
       "--force",
+      "--revision",
+      "src@HEAD",
       "--output-json",
       "/path/to/tmp/json"
     ],
     "name": "gclient sync (3)",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"solutions\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 170242@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/native_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 274981@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/third_party/WebKit/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 124383@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/third_party/webrtc/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 120644@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/tools/swarm_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 200767@@@",
-      "@@@STEP_LOG_LINE@json.output@    }, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"src/tools/swarming_client/\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"revision\": 276089@@@",
-      "@@@STEP_LOG_LINE@json.output@    }@@@",
-      "@@@STEP_LOG_LINE@json.output@  }@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@",
-      "@@@SET_BUILD_PROPERTY@got_nacl_revision@274981@@@",
-      "@@@SET_BUILD_PROPERTY@got_webkit_revision@124383@@@",
-      "@@@SET_BUILD_PROPERTY@got_swarming_client_revision@276089@@@",
-      "@@@SET_BUILD_PROPERTY@got_webrtc_revision@120644@@@",
-      "@@@SET_BUILD_PROPERTY@got_revision@170242@@@",
-      "@@@SET_BUILD_PROPERTY@got_swarm_client_revision@200767@@@"
-    ]
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/apply_issue.py",
       "-r",
       "[SLAVE_BUILD]/src",
       "-i",
       "12853011",
       "-p",
       "1",
       "-s",
       "https://codereview.chromium.org",
       "--no-auth"
     ],
     "name": "apply_issue (3)",
     "seed_steps": [
       "apply_issue (3)",
       "gclient runhooks (2)",
       "compile (with patch, lkcr, clobber, nuke)"
-    ]
+    ],
+    "skip": true
   },
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "env": {
-      "GYP_DEFINES": "component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
+      "GYP_DEFINES": "component=shared_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 use_goma=1"
     },
-    "name": "gclient runhooks (2)"
+    "name": "gclient runhooks (2)",
+    "skip": true
   },
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/compile.py",
       "--target",
-      "Release",
+      "Debug",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]/goma",
       "--clobber",
       "--",
@@ skipping 17 matching lines @@
       "sync_unit_tests",
       "ui_unittests",
       "unit_tests",
       "browser_tests",
       "content_browsertests",
       "interactive_ui_tests",
       "sync_integration_tests",
       "chrome"
     ],
     "name": "compile (with patch, lkcr, clobber, nuke)",
-    "~followup_annotations": [
-      "step returned non-zero exit code: 1",
-      "@@@STEP_FAILURE@@@"
-    ]
+    "skip": true
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport os, shutil, sys\nfor p in [os.path.join(sys.argv[1], x) for x in os.listdir(sys.argv[1])]:\n  if os.path.isdir(p):\n    shutil.rmtree(p)\n  else:\n    os.unlink(p)\n",
+      "[SLAVE_BUILD]/src/out/Debug_gn"
+    ],
+    "name": "rmcontents slave gn build directory",
+    "skip": true
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[DEPOT_TOOLS]/gn.py",
+      "--root=[SLAVE_BUILD]/src",
+      "gen",
+      "//out/Debug_gn",
+      "--args=is_debug=true"
+    ],
+    "name": "gn (2)",
+    "skip": true
+  },
+  {
+    "cmd": [
+      "[DEPOT_TOOLS]/ninja",
+      "-C",
+      "[SLAVE_BUILD]/src/out/Debug_gn"
+    ],
+    "name": "compile (gn with patch, lkcr, clobber)",
+    "skip": true
   }
 ]