Use C++11 range-based loop for core/css

Source/core/css/CSSCanvasValue.cpp

 /*
  * Copyright (C) 2008 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 33 matching lines @@
     StringBuilder result;
     result.appendLiteral("-webkit-canvas(");
     result.append(m_name);
     result.append(')');
     return result.toString();
 }
 
 void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect)
 {
     IntRect imageChangeRect = enclosingIntRect(changedRect);
-    RenderObjectSizeCountMap::const_iterator end = clients().end();
-    for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr != end; ++curr)
-        const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
+    for (const auto& curr : clients())
+        const_cast<RenderObject*>(curr.key)->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);
 }
 
 void CSSCanvasValue::canvasResized(HTMLCanvasElement*)
 {
-    RenderObjectSizeCountMap::const_iterator end = clients().end();
-    for (RenderObjectSizeCountMap::const_iterator curr = clients().begin(); curr != end; ++curr)
-        const_cast<RenderObject*>(curr->key)->imageChanged(static_cast<WrappedImagePtr>(this));
+    for (const auto& curr : clients())
+        const_cast<RenderObject*>(curr.key)->imageChanged(static_cast<WrappedImagePtr>(this));
 }
 
 #if !ENABLE(OILPAN)
 void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element)
 {
     ASSERT_UNUSED(element, element == m_element);
     m_element = nullptr;
 }
 #endif
 
@@ skipping 28 matching lines @@
 }
 
 void CSSCanvasValue::traceAfterDispatch(Visitor* visitor)
 {
     visitor->trace(m_canvasObserver);
     visitor->trace(m_element);
     CSSImageGeneratorValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink