      selector_query_cache_ = std::make_unique<SelectorQueryCache>();
 --- a/third_party/blink/renderer/core/dom/document.h
 +++ b/third_party/blink/renderer/core/dom/document.h
-@@ -412,6 +412,10 @@ class CORE_EXPORT Document : public Cont
+@@ -414,6 +414,10 @@ class CORE_EXPORT Document : public Cont
  
    String origin() const;
  

   String visibilityState() const;
   mojom::PageVisibilityState GetPageVisibilityState() const;
   bool hidden() const;
@@ -1679,6 +1683,9 @@ class CORE_EXPORT Document : public Cont
 
   double start_time_;
 

      SINGLE_VALUE_TYPE(switches::kIgnoreGpuBlacklist)},
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -20,6 +20,7 @@
 #include "services/network/public/cpp/features.h"
 #include "third_party/blink/public/common/features.h"
 #include "third_party/blink/public/platform/web_runtime_features.h"
+#include "third_party/ungoogled/ungoogled_switches.h"
 #include "ui/gfx/switches.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/native_theme/native_theme_features.h"
@@ -462,6 +463,9 @@ void SetRuntimeFeaturesDefaultsAndUpdate
   if (command_line.HasSwitch(switches::kEnableAccessibilityObjectModel))
     WebRuntimeFeatures::EnableAccessibilityObjectModel(true);
 
+  WebRuntimeFeatures::EnableFingerprintingClientRectsNoise(
+      command_line.HasSwitch(switches::kFingerprintingClientRectsNoise));
