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 dc73053c81ea21d00a0caf54fa45638805215bbe..ecd2587a18a7ee76be63b5e2202fc150bacf4c8b 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1366,6 +1366,15 @@ public:
     // Called before anonymousChild.setStyle(). Override to set custom styles for the child.
     virtual void updateAnonymousChildStyle(const LayoutObject& anonymousChild, ComputedStyle& style) const { }
 
+    // Returns a rect corresponding to this LayoutObject's bounds for use in debugging output
+    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: