--- a/layout/generic/nsBlockFrame.cpp
+++ b/layout/generic/nsBlockFrame.cpp
@@ -223,16 +223,34 @@ nsBlockFrame::InitDebugFlags()
 #ifdef DEBUG
 const char* nsBlockFrame::kReflowCommandType[] = {
   "ContentChanged",
   "StyleChanged",
   "ReflowDirty",
   "Timeout",
   "UserDefined",
 };
+
+const char*
+nsBlockFrame::LineReflowStatusToString(uint8_t aLineReflowStatus) const
+{
+  switch (aLineReflowStatus) {
+    case LINE_REFLOW_OK: return "LINE_REFLOW_OK";
+    case LINE_REFLOW_STOP: return "LINE_REFLOW_STOP";
+    case LINE_REFLOW_REDO_NO_PULL: return "LINE_REFLOW_REDO_NO_PULL";
+    case LINE_REFLOW_REDO_MORE_FLOATS: return "LINE_REFLOW_REDO_MORE_FLOATS";
+    case LINE_REFLOW_REDO_NEXT_BAND: return "LINE_REFLOW_REDO_NEXT_BAND";
+    case LINE_REFLOW_TRUNCATED: return "LINE_REFLOW_TRUNCATED";
+    default:
+      break;
+  }
+  MOZ_ASSERT_UNREACHABLE("Unknown LineReflowStatus!!");
+  return "unknown";
+}
+
 #endif
 
 #ifdef REFLOW_STATUS_COVERAGE
 static void
 RecordReflowStatus(bool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
 {
   static uint32_t record[2];
 
@@ -3795,24 +3813,16 @@ nsBlockFrame::PushTruncatedLine(BlockRef
                                 line_iterator       aLine,
                                 bool*               aKeepReflowGoing)
 {
   PushLines(aState, aLine.prev());
   *aKeepReflowGoing = false;
   NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
 }
 
-#ifdef DEBUG
-static const char* LineReflowStatusNames[] = {
-  "LINE_REFLOW_OK", "LINE_REFLOW_STOP", "LINE_REFLOW_REDO_NO_PULL",
-  "LINE_REFLOW_REDO_MORE_FLOATS",
-  "LINE_REFLOW_REDO_NEXT_BAND", "LINE_REFLOW_TRUNCATED"
-};
-#endif
-
 void
 nsBlockFrame::DoReflowInlineFrames(BlockReflowInput& aState,
                                    nsLineLayout& aLineLayout,
                                    line_iterator aLine,
                                    nsFlowAreaRect& aFloatAvailableSpace,
                                    nscoord& aAvailableSpaceHeight,
                                    nsFloatManager::SavedState*
                                      aFloatStateBeforeLine,
@@ -4023,17 +4033,17 @@ nsBlockFrame::DoReflowInlineFrames(Block
                      aKeepReflowGoing)) {
         lineReflowStatus = LINE_REFLOW_REDO_MORE_FLOATS;
         // PlaceLine already called GetAvailableSpaceForBSize for us.
       }
     }
   }
 #ifdef DEBUG
   if (gNoisyReflow) {
-    printf("Line reflow status = %s\n", LineReflowStatusNames[lineReflowStatus]);
+    printf("Line reflow status = %s\n", LineReflowStatusToString(lineReflowStatus));
   }
 #endif
 
   if (aLineLayout.GetDirtyNextLine()) {
     // aLine may have been pushed to the overflow lines.
     FrameLines* overflowLines = GetOverflowLines();
     // We can't just compare iterators front() to aLine here, since they may be in
     // different lists.

--- a/layout/generic/nsBlockFrame.h
+++ b/layout/generic/nsBlockFrame.h
@@ -141,16 +141,17 @@ public:
 
 #ifdef DEBUG_FRAME_DUMP
   void List(FILE* out = stderr, const char* aPrefix = "", uint32_t aFlags = 0) const override;
   virtual nsresult GetFrameName(nsAString& aResult) const override;
 #endif
 
 #ifdef DEBUG
   virtual nsFrameState GetDebugStateBits() const override;
+  const char* LineReflowStatusToString(uint8_t aLineReflowStatus) const;
 #endif
 
 #ifdef ACCESSIBILITY
   virtual mozilla::a11y::AccType AccessibleType() override;
 #endif
 
   // line cursor methods to speed up searching for the line(s)
   // containing a point. The basic idea is that we set the cursor