Use C++11 range-based loop for core/clipboard, core/dom and core/testing

Source/core/clipboard/DataObject.cpp

 /*
  * Copyright (c) 2008, 2009, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
 PassRefPtrWillBeRawPtr<DataObject> DataObject::createFromPasteboard(PasteMode pasteMode)
 {
     RefPtrWillBeRawPtr<DataObject> dataObject = create();
     blink::WebClipboard::Buffer buffer = Pasteboard::generalPasteboard()->buffer();
     uint64_t sequenceNumber = blink::Platform::current()->clipboard()->sequenceNumber(buffer);
     bool ignored;
     blink::WebVector<blink::WebString> webTypes = blink::Platform::current()->clipboard()->readAvailableTypes(buffer, &ignored);
     ListHashSet<String> types;
     for (size_t i = 0; i < webTypes.size(); ++i)
         types.add(webTypes[i]);
-    for (ListHashSet<String>::const_iterator it = types.begin(); it != types.end(); ++it) {
-        if (pasteMode == PlainTextOnly && *it != mimeTypeTextPlain)
+    for (const String& type : types) {
+        if (pasteMode == PlainTextOnly && type != mimeTypeTextPlain)
             continue;
-        dataObject->m_itemList.append(DataObjectItem::createFromPasteboard(*it, sequenceNumber));
+        dataObject->m_itemList.append(DataObjectItem::createFromPasteboard(type, sequenceNumber));
     }
     return dataObject.release();
 }
 
 PassRefPtrWillBeRawPtr<DataObject> DataObject::create()
 {
     return adoptRefWillBeNoop(new DataObject());
 }
 
 PassRefPtrWillBeRawPtr<DataObject> DataObject::copy() const
@@ skipping 193 matching lines @@
 
 void DataObject::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_itemList);
     HeapSupplementable<DataObject>::trace(visitor);
 #endif
 }
 
 } // namespace blink