Extend chromium_tests trigger to work across masters.

scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json
index 2bcf1c1423de917343a44bdf6f24c733b16b7503..6cc46a5427aad3fdf8c73067143d3972131f7197 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Builder.json
@@ -305,16 +305,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Low-End Perf (1)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (2)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Low-End Perf (2)",
         "properties": {
@@ -333,16 +324,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Low-End Perf (2)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (3)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Perf (1)",
         "properties": {
@@ -361,16 +343,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Perf (1)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (4)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Perf (2)",
         "properties": {
@@ -389,16 +362,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Perf (2)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (5)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Perf (3)",
         "properties": {
@@ -417,16 +381,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Perf (3)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (6)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Perf (4)",
         "properties": {
@@ -445,16 +400,7 @@
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
-      }
-    ],
-    "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Perf (4)@@@"
-    ]
-  },
-  {
-    "cmd": [],
-    "name": "trigger (7)",
-    "trigger_specs": [
+      },
       {
         "builder_name": "Win 7 Perf (5)",
         "properties": {
@@ -476,7 +422,7 @@
       }
     ],
     "~followup_annotations": [
-      "@@@STEP_TEXT@Win 7 Perf (5)@@@"
+      "@@@STEP_TEXT@Win 7 Low-End Perf (1)<br />Win 7 Low-End Perf (2)<br />Win 7 Perf (1)<br />Win 7 Perf (2)<br />Win 7 Perf (3)<br />Win 7 Perf (4)<br />Win 7 Perf (5)@@@"
     ]
   },
   {