Revert of MD Settings: enable by default in client

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index c16e62dc8f9a61ba33d0808fd34e88555fac84b6..eb721478de6f992bc62167021f111c2f643683a9 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -157,7 +157,7 @@
 // Enables or disables the Material Design version of chrome://settings.
 // Also affects chrome://help.
 const base::Feature kMaterialDesignSettings{"MaterialDesignSettings",
-                                            base::FEATURE_ENABLED_BY_DEFAULT};
+                                            base::FEATURE_DISABLED_BY_DEFAULT};
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 // Enables media content bitstream remoting, an optimization that can activate