Extend the ToRenderFrameHost magic to FrameTreeNode* and Shell*

content/browser/indexed_db/indexed_db_browsertest.cc

Index: content/browser/indexed_db/indexed_db_browsertest.cc
diff --git a/content/browser/indexed_db/indexed_db_browsertest.cc b/content/browser/indexed_db/indexed_db_browsertest.cc
index 922d5bea0fdefc9c60ae41ad358710d221e02f87..be582437ff678e243a14eb4ea0165c644aafc4f2 100644
--- a/content/browser/indexed_db/indexed_db_browsertest.cc
+++ b/content/browser/indexed_db/indexed_db_browsertest.cc
@@ -93,8 +93,7 @@ class IndexedDBBrowserTest : public ContentBrowserTest,
     if (result != "pass") {
       std::string js_result;
       ASSERT_TRUE(ExecuteScriptAndExtractString(
-          the_browser->web_contents(),
-          "window.domAutomationController.send(getLog())",
+          the_browser, "window.domAutomationController.send(getLog())",
           &js_result));
       FAIL() << "Failed: " << js_result;
     }