Merge 104317 - Crash with range selection across different documents.

Source/WebCore/page/DOMSelection.cpp

Index: Source/WebCore/page/DOMSelection.cpp
===================================================================
--- Source/WebCore/page/DOMSelection.cpp	(revision 105345)
+++ Source/WebCore/page/DOMSelection.cpp	(working copy)
@@ -421,7 +421,7 @@
         }
     } else {
         // We don't support discontiguous selection. We don't do anything if r and range don't intersect.
-        if (r->compareBoundaryPoints(Range::END_TO_START, range.get(), ec) < 1) {
+        if (r->compareBoundaryPoints(Range::END_TO_START, range.get(), ec) < 1 && !ec) {
             if (r->compareBoundaryPoints(Range::END_TO_END, range.get(), ec) == -1)
                 // The original range contains r.
                 selection->setSelection(VisibleSelection(range.get()));