Bug 1391978 - Part 5. Replace nsISelection::GetFocusOffset/GetAnchroOffset with Selection::FocusOffset/AnchorOffset. r=masayuki

MozReview-Commit-ID: 6OpO1GQyhFO

--HG--
extra : rebase_source : 3e57ddbebc7985ec0e5ada4b1e83631d6f1c83b5
extra : histedit_source : 655c5c3e4c4a3f30d028f9b4b316573a187bd0f0

editor/libeditor/HTMLEditor.cpp

@@ -2451,17 +2451,17 @@ HTMLEditor::GetSelectedElement(const nsAString& aTagName,
       NS_ENSURE_SUCCESS(rv, rv);
       int32_t anchorOffset = -1;
       if (anchorNode) {
-        selection->GetAnchorOffset(&anchorOffset);
+        anchorOffset = selection->AnchorOffset();
       }
 
       nsCOMPtr<nsINode> focusNode = selection->GetFocusNode();
       int32_t focusOffset = -1;
       if (focusNode) {
-        selection->GetFocusOffset(&focusOffset);
+        focusOffset = selection->FocusOffset();
       }
 
       // Link node must be the same for both ends of selection
-      if (NS_SUCCEEDED(rv) && anchorNode) {
+      if (anchorNode) {
         nsCOMPtr<nsIDOMElement> parentLinkOfAnchor;
         rv = GetElementOrParentByTagName(NS_LITERAL_STRING("href"),
                                          anchorNode,