Refactoring out the code in LayoutTreeAsText::writeLayoutObject.

third_party/WebKit/Source/core/layout/LayoutObject.h

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index a2816297526db24266be19aff26e2af74e2d2f99..022d229658e20f736f11ce987bacde56760b2331 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1366,6 +1366,16 @@ public:
     // Called before anonymousChild.setStyle(). Override to set custom styles for the child.
     virtual void updateAnonymousChildStyle(const LayoutObject& anonymousChild, ComputedStyle& style) const { }
 
+    // Fixed implementation for LayoutText, LayoutInline, LayoutTableCell and
+    // LayoutBox.
+    virtual LayoutRect debugRect() const
+    {
+        // This method should never be reached as it's overriden by subclasses.
+        NOTREACHED();
+        LayoutRect r;
+        return r;
+    }
+
     // Painters can use const methods only, except for these explicitly declared methods.
     class MutableForPainting {
     public: