DevTools: Makes script URL correct for imported documents that have nested imports.

BUG=354445

Review URL: https://codereview.chromium.org/206503004

git-svn-id: svn://svn.chromium.org/blink/trunk@170533 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/html/parser/HTMLScriptRunner.cpp

@@ -72,9 +72,15 @@ void HTMLScriptRunner::detach()
 
 static KURL documentURLForScriptExecution(Document* document)
 {
-    if (!document || !document->frame())
+    if (!document)
         return KURL();
 
+    if (!document->frame()) {
+        if (document->import())
+            return document->url();
+        return KURL();
+    }
+
     // Use the URL of the currently active document for this frame.
     return document->frame()->document()->url();
 }