[DevTools] Adjust svg elements highlight to the root FrameView origin.

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index be4d82ff0d3d3cd3d7727e812ae1c701088ec303..8994ce183d28c75f2528f28d51520aef925ba392 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -1487,6 +1487,17 @@ void Internals::setInspectorResourcesDataSizeLimits(int maximumResourcesContentS
     page->inspectorController().setResourcesDataSizeLimitsFromInternals(maximumResourcesContentSize, maximumSingleResourceContentSize);
 }
 
+String Internals::inspectorHighlightJSON(Node* node, ExceptionState& exceptionState)
+{
+    Page* page = contextDocument()->frame()->page();
+    if (!page) {
+        exceptionState.throwDOMException(InvalidAccessError, "No page can be obtained from the current context document.");
+        return String();
+    }
+    RefPtr<JSONObject> json(page->inspectorController().highlightJSONForNode(node));
+    return json->toPrettyJSONString();
+}
+
 bool Internals::hasGrammarMarker(Document* document, int from, int length)
 {
     ASSERT(document);