Common invalidateTreeIfNeeded()

Source/core/rendering/RenderText.h

Index: Source/core/rendering/RenderText.h
diff --git a/Source/core/rendering/RenderText.h b/Source/core/rendering/RenderText.h
index 97ab8febe31dd1530d9753d0f1a1ddb26a58c64f..47f341983a5a8cc0fe35c56fbf0889f79a80423e 100644
--- a/Source/core/rendering/RenderText.h
+++ b/Source/core/rendering/RenderText.h
@@ -184,6 +184,9 @@ private:
 
     bool isText() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
 
+    // FIXME: This is temporarily empty. Will let it actually work in following steps.
+    virtual InvalidationReason invalidatePaintIfNeeded(const PaintInvalidationState&, const RenderLayerModelObject&) OVERRIDE FINAL { return InvalidationNone; }
+
     // We put the bitfield first to minimize padding on 64-bit.
     bool m_hasBreakableChar : 1; // Whether or not we can be broken into multiple lines.
     bool m_hasBreak : 1; // Whether or not we have a hard break (e.g., <pre> with '\n').