Added support for StyleChanged reflow reason

layout/generic/nsBlockFrame.cpp

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/generic/nsBlockReflowState.cpp

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/generic/nsBlockReflowState.h

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/generic/nsInlineFrame.cpp

@@ -610,7 +610,8 @@ nsInlineFrame::Reflow(nsIPresContext& aPresContext,
       aStatus = ChildIncrementalReflow(state, inlineReflow);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLists(aPresContext);
     aStatus = ResizeReflow(state, inlineReflow);
   }

layout/html/base/src/nsBlockFrame.cpp

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/html/base/src/nsBlockReflowState.cpp

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/html/base/src/nsBlockReflowState.h

@@ -1756,7 +1756,8 @@ nsBlockFrame::Reflow(nsIPresContext&          aPresContext,
       rv = ChildIncrementalReflow(state);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLines();
     rv = ResizeReflow(state);
   }

layout/html/base/src/nsInlineFrame.cpp

@@ -610,7 +610,8 @@ nsInlineFrame::Reflow(nsIPresContext& aPresContext,
       aStatus = ChildIncrementalReflow(state, inlineReflow);
     }
   }
-  else if (eReflowReason_Resize == state.reason) {
+  else if ((eReflowReason_Resize == state.reason) ||
+           (eReflowReason_StyleChange == state.reason)) {
     DrainOverflowLists(aPresContext);
     aStatus = ResizeReflow(state, inlineReflow);
   }