Auto-reboot the chromium.gpu and chromium.gpu.fyi bots.

masters/master.chromium.gpu/slaves.cfg

Index: masters/master.chromium.gpu/slaves.cfg
diff --git a/masters/master.chromium.gpu/slaves.cfg b/masters/master.chromium.gpu/slaves.cfg
index 341afa9ef08e508d778fcfc019b061674f404a22..4cdc927a97610a45ce69d6a24e42b484e666784f 100644
--- a/masters/master.chromium.gpu/slaves.cfg
+++ b/masters/master.chromium.gpu/slaves.cfg
@@ -13,8 +13,7 @@ slaves = [
     'recipe': 'chromium',
     'build_config': 'Release',
     'gatekeeper_categories': 'compile',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -25,8 +24,7 @@ slaves = [
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Debug',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -39,9 +37,7 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
     'gatekeeper_categories': 'testers',
   },
   {
@@ -55,9 +51,7 @@ slaves = [
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -70,9 +64,7 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -84,8 +76,7 @@ slaves = [
     'recipe': 'chromium',
     'build_config': 'Release',
     'gatekeeper_categories': 'compile',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -96,8 +87,7 @@ slaves = [
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Debug',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -110,9 +100,7 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -125,9 +113,7 @@ slaves = [
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -140,9 +126,7 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
     'gatekeeper_categories': 'testers',
   },
   {
@@ -156,9 +140,7 @@ slaves = [
     'bits': '64',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -171,9 +153,7 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -189,9 +169,7 @@ slaves = [
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -203,8 +181,7 @@ slaves = [
     'recipe': 'chromium',
     'build_config': 'Release',
     'gatekeeper_categories': 'compile',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -215,8 +192,7 @@ slaves = [
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Debug',
-    # This bot only does builds and it seems sub-optimal to reboot in between.
-    'auto_reboot': False,
+    # All bots on these waterfalls are auto-rebooted between runs for stability.
   },
   {
     'master': 'ChromiumGPU',
@@ -230,8 +206,8 @@ slaves = [
     'build_config': 'Release',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
+    # This physical host is shared between multiple builders and can't
+    # be auto-rebooted.
     'auto_reboot': False,
     'gatekeeper_categories': 'testers',
   },
@@ -247,8 +223,8 @@ slaves = [
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
-    # This bot only triggers and collects Swarming results and doesn't
-    # need to be auto-rebooted.
+    # This physical host is shared between multiple builders and can't
+    # be auto-rebooted.
     'auto_reboot': False,
   },
   {