Merge 110307

Source/WebCore/svg/SVGAElement.cpp

Index: Source/WebCore/svg/SVGAElement.cpp
===================================================================
--- Source/WebCore/svg/SVGAElement.cpp	(revision 112617)
+++ Source/WebCore/svg/SVGAElement.cpp	(working copy)
@@ -39,6 +39,7 @@
 #include "MouseEvent.h"
 #include "PlatformMouseEvent.h"
 #include "RenderSVGInline.h"
+#include "RenderSVGText.h"
 #include "RenderSVGTransformableContainer.h"
 #include "ResourceRequest.h"
 #include "SVGElementInstance.h"
@@ -236,6 +237,19 @@
     return SVGElement::childShouldCreateRenderer(child);
 }
 
+void SVGAElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+{
+    SVGStyledTransformableElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+
+    if (changedByParser || !renderer())
+        return;
+
+    // Invalidate the TextPosition cache in SVGTextLayoutAttributesBuilder as it may now point
+    // to no-longer existing SVGTextPositioningElements and thus needs to be rebuilt.
+    if (RenderSVGText* textRenderer = RenderSVGText::locateRenderSVGTextAncestor(renderer()))
+        textRenderer->textDOMChanged();
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(SVG)