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

Source/core/paint/GridPainter.cpp

Index: Source/core/paint/GridPainter.cpp
diff --git a/Source/core/paint/GridPainter.cpp b/Source/core/paint/GridPainter.cpp
index 0c0f880a171e4d9d90be89bd1142d0e141ed45c1..d9077dcc1825eff7b4420441ad4bc766867902ea 100644
--- a/Source/core/paint/GridPainter.cpp
+++ b/Source/core/paint/GridPainter.cpp
@@ -57,9 +57,9 @@ void GridPainter::paintChildren(const PaintInfo& paintInfo, const LayoutPoint& p
         }
     }
 
-    for (Vector<RenderBox*>::const_iterator it = m_renderGrid.itemsOverflowingGridArea().begin(); it != m_renderGrid.itemsOverflowingGridArea().end(); ++it) {
-        if ((*it)->frameRect().intersects(localPaintInvalidationRect))
-            gridItemsToBePainted.append(std::make_pair(*it, m_renderGrid.paintIndexForGridItem(*it)));
+    for (const auto& it : m_renderGrid.itemsOverflowingGridArea()) {
+        if (it->frameRect().intersects(localPaintInvalidationRect))
+            gridItemsToBePainted.append(std::make_pair(it, m_renderGrid.paintIndexForGridItem(it)));
     }
 
     // Sort grid items following order-modified document order.
@@ -67,10 +67,10 @@ void GridPainter::paintChildren(const PaintInfo& paintInfo, const LayoutPoint& p
     std::stable_sort(gridItemsToBePainted.begin(), gridItemsToBePainted.end(), GridItemsSorter());
 
     RenderBox* previous = 0;
-    for (Vector<std::pair<RenderBox*, size_t> >::const_iterator it = gridItemsToBePainted.begin(); it != gridItemsToBePainted.end(); ++it) {
+    for (const auto& it : gridItemsToBePainted) {
         // We might have duplicates because of spanning children are included in all cells they span.
         // Skip them here to avoid painting items several times.
-        RenderBox* current = it->first;
+        RenderBox* current = it.first;
         if (current == previous)
             continue;