diff --git a/webrtc/build/mb_config.pyl b/webrtc/build/mb_config.pyl
index db732a9a0f..d49edea51f 100644
--- a/webrtc/build/mb_config.pyl
+++ b/webrtc/build/mb_config.pyl
@@ -12,20 +12,64 @@
 # easy to try different configurations of GYP and GN in tryjob patches.
 
 {
+  # This is a map of buildbot master names -> buildbot builder names ->
+  # config names (where each config name is a key in the 'configs' dict,
+  # above). mb uses this dict to look up which config to use for a given bot.
+  # The builders should be sorted by the order they appear in the /builders
+  # page on the buildbots, *not* alphabetically.
+  'masters': {
+    'client.webrtc': {
+      'iOS32 Debug': 'ios_gyp_debug_bot_arm_device',
+      'iOS32 Release': 'ios_gyp_release_bot_arm_device',
+      'iOS64 Debug': 'ios_gyp_debug_bot_arm64_device',
+      'iOS64 Release': 'ios_gyp_release_bot_arm64_device',
+      'iOS32 Debug Simulator': 'ios_gyp_debug_bot_x86',
+      'iOS64 Debug Simulator': 'ios_gyp_debug_bot_x64',
+      'iOS64 Debug (GN)': 'ios_gn_debug_bot_arm64_device',
+      'iOS64 Release (GN)': 'ios_gn_release_bot_arm64_device',
+    },
+    'tryserver.webrtc': {
+      'ios_dbg': 'ios_gyp_debug_bot_arm_device',
+      'ios_rel': 'ios_gyp_release_bot_arm_device',
+      'ios_arm64_dbg': 'ios_gyp_debug_bot_arm64_device',
+      'ios_arm64_rel': 'ios_gyp_release_bot_arm64_device',
+      'ios32_sim_dbg': 'ios_gyp_debug_bot_x86',
+      'ios64_sim_dbg': 'ios_gyp_debug_bot_x64',
+      'ios64_gn_dbg': 'ios_gn_debug_bot_arm64_device',
+      'ios64_gn_rel': 'ios_gn_release_bot_arm64_device',
+    },
+  },
+
   # This is the list of configs that you can pass to mb; each config
   # represents a particular combination of GYP_DEFINES/gn args that
   # we must support. A given config *may* be platform-specific but
   # is not necessarily so (i.e., we might have mac, win, and linux
   # bots all using the 'gn_release_bot' config).
   'configs': {
-    'ios_gn_debug_bot_arm64_device': ['ios', 'gn', 'debug_bot', 'arm64', 'device'],
-    'ios_gn_release_bot_arm64_device': ['ios', 'gn', 'release_bot', 'arm64', 'device'],
-    'ios_gyp_debug_bot_arm_device': ['ios', 'gyp', 'debug_bot', 'arm', 'device'],
-    'ios_gyp_release_bot_arm_device': ['ios', 'gyp', 'release_bot', 'arm', 'device'],
-    'ios_gyp_debug_bot_arm64_device': ['ios', 'gyp', 'debug_bot', 'arm64', 'device'],
-    'ios_gyp_release_bot_arm64_device': ['ios', 'gyp', 'release_bot', 'arm64', 'device'],
-    'ios_gyp_debug_bot_x86': ['ios', 'gyp', 'debug_bot', 'x86'],
-    'ios_gyp_debug_bot_x64': ['ios', 'gyp', 'release_bot', 'x64'],
+    'ios_gn_debug_bot_arm64_device': [
+      'ios', 'gn', 'debug_bot', 'arm64', 'device'
+    ],
+    'ios_gn_release_bot_arm64_device': [
+      'ios', 'gn', 'release_bot', 'arm64', 'device'
+    ],
+    'ios_gyp_debug_bot_arm_device': [
+      'ios', 'gyp', 'debug_bot', 'arm', 'device'
+    ],
+    'ios_gyp_release_bot_arm_device': [
+      'ios', 'gyp', 'release_bot', 'arm', 'device'
+    ],
+    'ios_gyp_debug_bot_arm64_device': [
+      'ios', 'gyp', 'debug_bot', 'arm64', 'device'
+    ],
+    'ios_gyp_release_bot_arm64_device': [
+      'ios', 'gyp', 'release_bot', 'arm64', 'device'
+    ],
+    'ios_gyp_debug_bot_x86': [
+      'ios', 'gyp', 'debug_bot', 'x86'
+    ],
+    'ios_gyp_debug_bot_x64': [
+      'ios', 'gyp', 'release_bot', 'x64'
+    ],
   },
 
   # This is a dict mapping a given 'mixin' name to a dict of settings that
@@ -91,32 +135,4 @@
       'gyp_defines': 'target_arch=ia32',
     },
   },
-
-  # This is a map of buildbot master names -> buildbot builder names ->
-  # config names (where each config name is a key in the 'configs' dict,
-  # above). mb uses this dict to look up which config to use for a given bot.
-  # The builders should be sorted by the order they appear in the /builders
-  # page on the buildbots, *not* alphabetically.
-  'masters': {
-    'client.webrtc': {
-      'iOS32 Debug': 'ios_gyp_debug_bot_arm_device',
-      'iOS32 Release': 'ios_gyp_release_bot_arm_device',
-      'iOS64 Debug': 'ios_gyp_debug_bot_arm64_device',
-      'iOS64 Release': 'ios_gyp_release_bot_arm64_device',
-      'iOS32 Debug Simulator': 'ios_gyp_debug_bot_x86',
-      'iOS64 Debug Simulator': 'ios_gyp_debug_bot_x64',
-      'iOS64 Debug (GN)': 'ios_gn_debug_bot_arm64_device',
-      'iOS64 Release (GN)': 'ios_gn_release_bot_arm64_device',
-    },
-    'tryserver.webrtc': {
-      'ios_dbg': 'ios_gyp_debug_bot_arm_device',
-      'ios_rel': 'ios_gyp_release_bot_arm_device',
-      'ios_arm64_dbg': 'ios_gyp_debug_bot_arm64_device',
-      'ios_arm64_rel': 'ios_gyp_release_bot_arm64_device',
-      'ios32_sim_dbg': 'ios_gyp_debug_bot_x86',
-      'ios64_sim_dbg': 'ios_gyp_debug_bot_x64',
-      'ios64_gn_dbg': 'ios_gn_debug_bot_arm64_device',
-      'ios64_gn_rel': 'ios_gn_release_bot_arm64_device',
-    },
-  },
 }