Revert of Separate repaint and layout requirements of StyleDifference (Step 1)

Source/core/rendering/RenderText.cpp

Index: Source/core/rendering/RenderText.cpp
diff --git a/Source/core/rendering/RenderText.cpp b/Source/core/rendering/RenderText.cpp
index c1454580badc4e41a49272dc4b68a2eb55b8e053..b233549f8ddda6d17ba70a33837838d7d548ddaa 100644
--- a/Source/core/rendering/RenderText.cpp
+++ b/Source/core/rendering/RenderText.cpp
@@ -193,7 +193,7 @@ void RenderText::styleDidChange(StyleDifference diff, const RenderStyle* oldStyl
     // we already did this for the parent of the text run.
     // We do have to schedule layouts, though, since a style change can force us to
     // need to relayout.
-    if (diff.needsFullLayout()) {
+    if (diff == StyleDifferenceLayout) {
         setNeedsLayoutAndPrefWidthsRecalc();
         m_knownToHaveNoOverflowAndNoFallbackFonts = false;
     }