Add pixel readback to page popup

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 651 matching lines @@
     if (!s_pagePopupDriver)
         s_pagePopupDriver = MockPagePopupDriver::create(page->deprecatedLocalMainFrame()).leakPtr();
     page->chrome().client().setPagePopupDriver(s_pagePopupDriver);
 }
 
 PassRefPtrWillBeRawPtr<PagePopupController> Internals::pagePopupController()
 {
     return s_pagePopupDriver ? s_pagePopupDriver->pagePopupController() : 0;
 }
 
+LocalDOMWindow* Internals::pagePopupWindow() const
+{
+    Document* document = contextDocument();
+    if (!document)
+        return nullptr;
+    Page* page = document->page();
+    if (!page)
+        return nullptr;
+    PagePopupDriver* pagePopupDriver = page->chrome().client().pagePopupDriver();
+    if (!pagePopupDriver)
+        return nullptr;
+    return pagePopupDriver->pagePopupWindow();
+}
+
 PassRefPtrWillBeRawPtr<ClientRect> Internals::absoluteCaretBounds(ExceptionState& exceptionState)
 {
     Document* document = contextDocument();
     if (!document || !document->frame()) {
         exceptionState.throwDOMException(InvalidAccessError, document ? "The document's frame cannot be retrieved." : "No context document can be obtained.");
         return ClientRect::create();
     }
 
     return ClientRect::create(document->frame()->selection().absoluteCaretBounds());
 }
@@ skipping 1543 matching lines @@
     }
     if (!element->isPluginElement()) {
         exceptionState.throwDOMException(InvalidNodeTypeError, "The element provided is not a plugin.");
         return;
     }
     element->ensureUserAgentShadowRoot().setInnerHTML(htmlSource, exceptionState);
     toHTMLPlugInElement(element)->setUsePlaceholderContent(true);
 }
 
 } // namespace blink