WebRTC: Remove Dr Memory bots.

scripts/slave/recipe_modules/chromium/api.py

Index: scripts/slave/recipe_modules/chromium/api.py
diff --git a/scripts/slave/recipe_modules/chromium/api.py b/scripts/slave/recipe_modules/chromium/api.py
index 37414c1a6b5b393bf77267ac25a5ab97afdd4031..817407cec8bfee3857a56cb177402834b8d9975b 100644
--- a/scripts/slave/recipe_modules/chromium/api.py
+++ b/scripts/slave/recipe_modules/chromium/api.py
@@ -446,14 +446,14 @@ class ChromiumApi(recipe_api.RecipeApi):
       full_args.append('--enable-msan')
     if self.c.gyp_env.GYP_DEFINES.get('tsan', 0) == 1:
       full_args.append('--enable-tsan')
-    if self.c.runtests.memory_tool:
+    if self.c.runtests.enable_memcheck:
       full_args.extend([
         '--pass-build-dir',
         '--pass-target',
         '--run-shell-script',
         self.c.runtests.memory_tests_runner,
         '--test', t_name,
-        '--tool', self.c.runtests.memory_tool,
+        '--tool', 'memcheck',
       ])
     else:
       full_args.append(test)