diff --git a/tools_webrtc/mb/mb_config.pyl b/tools_webrtc/mb/mb_config.pyl
index 72aa18d50e..fc458ef3e1 100644
--- a/tools_webrtc/mb/mb_config.pyl
+++ b/tools_webrtc/mb/mb_config.pyl
@@ -103,19 +103,20 @@
       },
     },
     'client.webrtc.perf': {
-      # Android
-      'Android32 Builder': 'android_pure_release_bot_arm',
-      'Android64 Builder': 'android_pure_release_bot_arm64',
-      'Android32 Tests (J Nexus4)': 'none',
-      'Android32 Tests (K Nexus5)': 'none',
-      'Android32 Tests (L Nexus5)': 'none',
-      'Android32 Tests (L Nexus6)': 'none',
-      'Android32 Tests (L Nexus7.2)': 'none',
-      'Android64 Tests (L Nexus9)': 'none',
-      'Linux Trusty': 'pure_release_bot_x64',
-      'Mac 10.11': 'pure_release_bot_x64',
-      'Win7': 'win_clang_pure_release_bot_x86',
+      # These are here because testers need to gn gen + ninja for the
+      # webrtc_dashboard_upload target (otherwise a tester would not need to
+      # build anything).
+      # TODO(http://crbug.com/1029452): Nuke these and isolate on builder
+      # instead?
+      'Perf Android32 (K Nexus5)': 'release_bot_x64',
+      'Perf Android32 (M AOSP Nexus6)': 'release_bot_x64',
+      'Perf Android64 (M Nexus5X)': 'release_bot_x64',
+      'Perf Android64 (O Pixel2)': 'release_bot_x64',
+      'Perf Linux Trusty': 'release_bot_x64',
+      'Perf Mac 10.11': 'release_bot_x64',
+      'Perf Win7': 'release_bot_x64',
     },
+
     'client.webrtc.fyi': {
       # Mac
       'Mac (swarming)': 'release_bot_x64',
@@ -446,12 +447,6 @@
     'rtti_no_sctp_android_arm': [
       'android', 'debug_static_bot', 'arm', 'rtti', 'no_sctp'
     ],
-
-    # This is used for tracking purposes; any bot that uses this config
-    # should never actually run MB.
-    'none': [
-      'error',
-    ],
   },
 
   # This is a dict mapping a given 'mixin' name to a dict of settings that
@@ -498,14 +493,6 @@
       'mixins': ['debug', 'minimal_symbols', 'goma'],
     },
 
-    # This mixin is used to force configs that use it to fail. It
-    # is used in two cases: when we have bots that we haven't looked
-    # at yet and don't know whether they need MB or not, and for bots
-    # that are test-only and should never run MB.
-    'error': {
-      'gn_args': 'error',
-    },
-
     'full_symbols': {
       'gn_args': 'symbol_level=2',
     },