Implement Main Thread RAF Aligned Input

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 5e28c3f52aca23b5c2eaf86e58803b7302c1285f..644e2736e377fa6de2a65b3c67c226fad077c2b0 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -109,6 +109,10 @@ const base::Feature kPassiveEventListenersDueToFling{
 const base::Feature kPointerEvents{"PointerEvent",
                                    base::FEATURE_DISABLED_BY_DEFAULT};
 
+// RAF aligned input events support.
+const base::Feature kRafAlignedInputEvents{"RafAlignedInput",
+                                           base::FEATURE_DISABLED_BY_DEFAULT};
+
 // If Pepper 3D Image Chromium is allowed, this feature controls whether it is
 // enabled.
 const base::Feature kPepper3DImageChromium{"Pepper3DImageChromium",