Make InlineBox::renderer() and related subclass methods return reference.

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 399c0380079a52efb44ec07c23aca9afcdf972da..b0239d5910d993b294062f7a6305d505be86cd08 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -1217,6 +1217,18 @@ private:
     LayoutRect m_newRepaintRect;
 };
 
+// Allow equality comparisons of RenderObject's by reference or pointer, interchangeably.
+inline bool operator==(const RenderObject& a, const RenderObject& b) { return &a == &b; }
+inline bool operator==(const RenderObject& a, const RenderObject* b) { return &a == b; }
+inline bool operator==(const RenderObject* a, const RenderObject& b) { return a == &b; }
+inline bool operator!=(const RenderObject& a, const RenderObject& b) { return !(a == b); }
+inline bool operator!=(const RenderObject& a, const RenderObject* b) { return !(a == b); }
+inline bool operator!=(const RenderObject* a, const RenderObject& b) { return !(a == b); }
+inline bool operator==(const PassRefPtr<RenderObject>& a, const RenderObject& b) { return a.get() == &b; }

[Inactive, 2014/02/28 14:16:42]

Are the ones taking PassRefPtrs really needed right now?

[ostap, 2014/02/28 15:37:23]

Done.

+inline bool operator==(const RenderObject& a, const PassRefPtr<RenderObject>& b) { return &a == b.get(); }
+inline bool operator!=(const PassRefPtr<RenderObject>& a, const RenderObject& b) { return !(a == b); }
+inline bool operator!=(const RenderObject& a, const PassRefPtr<RenderObject>& b) { return !(a == b); }
+
 inline bool RenderObject::documentBeingDestroyed() const
 {
     return !document().renderer();