Add viewport settings for ImageDocument and MediaDocument

Source/core/html/ImageDocument.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 173 matching lines @@
 }
 
 void ImageDocument::createDocumentStructure()
 {
     RefPtr<Element> rootElement = Document::createElement(htmlTag, false);
     appendChild(rootElement, IGNORE_EXCEPTION);
     static_cast<HTMLHtmlElement*>(rootElement.get())->insertedByParser();
 
     if (frame() && frame()->loader())
         frame()->loader()->dispatchDocumentElementAvailable();
-    
+
+    RefPtr<Element> head = document()->createElement(headTag, false);
+    rootElement->appendChild(head, IGNORE_EXCEPTION);
+
+    RefPtr<Element> meta = document()->createElement(metaTag, false);
+    meta->setAttribute(nameAttr, "viewport");
+    meta->setAttribute(contentAttr, "width=device-width");
+    head->appendChild(meta, IGNORE_EXCEPTION);
+
     RefPtr<Element> body = Document::createElement(bodyTag, false);
     body->setAttribute(styleAttr, "margin: 0px;");
     
     rootElement->appendChild(body, IGNORE_EXCEPTION);
     
     RefPtr<ImageDocumentElement> imageElement = ImageDocumentElement::create(this);
     
     imageElement->setAttribute(styleAttr, "-webkit-user-select: none");        
     imageElement->setLoadManually(true);
     imageElement->setSrc(url().string());
@@ skipping 193 matching lines @@
 void ImageDocumentElement::didMoveToNewDocument(Document* oldDocument)
 {
     if (m_imageDocument) {
         m_imageDocument->disconnectImageElement();
         m_imageDocument = 0;
     }
     HTMLImageElement::didMoveToNewDocument(oldDocument);
 }
 
 }