diff --git a/layout/base/public/nsIReflowCommand.h b/layout/base/public/nsIReflowCommand.h
index 5381a7d37fc..bfba3ea430d 100644
--- a/layout/base/public/nsIReflowCommand.h
+++ b/layout/base/public/nsIReflowCommand.h
@@ -80,17 +80,6 @@ public:
     // reflow command is the frame that changed style.
     StyleChanged,
 
-    // When an incremental reflow operation affects a next-in-flow,
-    // these commands are used to get the next-in-flow to update
-    // itself.
-    PullupReflow,
-    PushReflow,
-
-    // This command is used to see if a prev-in-flow wants to pullup
-    // some children from a next-in-flow that has changed because of
-    // an incremental reflow.
-    CheckPullupReflow,
-
     // Reflow dirty stuff (really a per-frame extension)
     ReflowDirty,
 
diff --git a/layout/generic/nsBlockFrame.cpp b/layout/generic/nsBlockFrame.cpp
index b43ed365fef..480d66245bf 100644
--- a/layout/generic/nsBlockFrame.cpp
+++ b/layout/generic/nsBlockFrame.cpp
@@ -168,9 +168,6 @@ nsBlockFrame::InitDebugFlags()
 static const char* kReflowCommandType[] = {
   "ContentChanged",
   "StyleChanged",
-  "PullupReflow",
-  "PushReflow",
-  "CheckPullupReflow",
   "ReflowDirty",
   "UserDefined",
 };
diff --git a/layout/generic/nsHTMLReflowCommand.cpp b/layout/generic/nsHTMLReflowCommand.cpp
index 74f301f8fc7..ba37c7377e1 100644
--- a/layout/generic/nsHTMLReflowCommand.cpp
+++ b/layout/generic/nsHTMLReflowCommand.cpp
@@ -225,9 +225,6 @@ NS_IMETHODIMP nsHTMLReflowCommand::List(FILE* out) const
   static const char* kReflowCommandType[] = {
     "ContentChanged",
     "StyleChanged",
-    "PullupReflow",
-    "PushReflow",
-    "CheckPullupReflow",
     "ReflowDirty",
     "UserDefined",
   };
diff --git a/layout/html/base/src/nsBlockFrame.cpp b/layout/html/base/src/nsBlockFrame.cpp
index b43ed365fef..480d66245bf 100644
--- a/layout/html/base/src/nsBlockFrame.cpp
+++ b/layout/html/base/src/nsBlockFrame.cpp
@@ -168,9 +168,6 @@ nsBlockFrame::InitDebugFlags()
 static const char* kReflowCommandType[] = {
   "ContentChanged",
   "StyleChanged",
-  "PullupReflow",
-  "PushReflow",
-  "CheckPullupReflow",
   "ReflowDirty",
   "UserDefined",
 };
diff --git a/layout/html/base/src/nsHTMLReflowCommand.cpp b/layout/html/base/src/nsHTMLReflowCommand.cpp
index 74f301f8fc7..ba37c7377e1 100644
--- a/layout/html/base/src/nsHTMLReflowCommand.cpp
+++ b/layout/html/base/src/nsHTMLReflowCommand.cpp
@@ -225,9 +225,6 @@ NS_IMETHODIMP nsHTMLReflowCommand::List(FILE* out) const
   static const char* kReflowCommandType[] = {
     "ContentChanged",
     "StyleChanged",
-    "PullupReflow",
-    "PushReflow",
-    "CheckPullupReflow",
     "ReflowDirty",
     "UserDefined",
   };