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 b63e645f68294998244914ea7fd3d559ff8a8de9..790b2cd9181047e725a3ca67d78214f3f417de5e 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
@@ -294,16 +294,7 @@
           "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": {
@@ -320,16 +311,7 @@
           "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": {
@@ -346,16 +328,7 @@
           "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": {
@@ -372,16 +345,7 @@
           "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": {
@@ -398,16 +362,7 @@
           "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": {
@@ -424,16 +379,7 @@
           "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": {
@@ -453,7 +399,7 @@
       }
     ],
     "~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)@@@"
     ]
   },
   {