OOP PDF: Fix PrintWebViewHelper test issues with OOP PDF enabled.

chrome/renderer/printing/print_web_view_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/printing/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 886 matching lines @@
 
   blink::WebDocument document = main_frame->document();
   // <object>/<iframe> with id="pdf-viewer" is created in
   // chrome/browser/resources/print_preview/print_preview.js
   blink::WebElement pdf_element = document.getElementById("pdf-viewer");
   if (pdf_element.isNull()) {
     NOTREACHED();
     return;
   }
 
-  // The out-of-process plugin element is nested within a frame.
+  // The out-of-process plugin element is nested within a frame. In tests, there
+  // may not be an iframe containing the out-of-process plugin, so continue with
+  // the element with ID "pdf-viewer" if it isn't an iframe.
   blink::WebLocalFrame* plugin_frame = pdf_element.document().frame();
   blink::WebElement plugin_element = pdf_element;
-  if (switches::OutOfProcessPdfEnabled()) {
-    if (!pdf_element.hasHTMLTagName("iframe")) {
-      NOTREACHED();
-      return;
-    }
+  if (switches::OutOfProcessPdfEnabled() &&
+      pdf_element.hasHTMLTagName("iframe")) {
     plugin_frame = blink::WebLocalFrame::fromFrameOwnerElement(pdf_element);
     plugin_element = GetPdfElement(plugin_frame);
     if (plugin_element.isNull()) {
       NOTREACHED();
       return;
     }
   }
 
   // Set |print_for_preview_| flag and autoreset it to back to original
   // on return.
@@ skipping 1130 matching lines @@
       blink::WebConsoleMessage::LevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing