Add wrapper container for a vector of OwnPtr<T>

cc/CCDirectRenderer.cpp

Index: cc/CCDirectRenderer.cpp
diff --git a/cc/CCDirectRenderer.cpp b/cc/CCDirectRenderer.cpp
index d0590faed7600fa079d2427cdc65801ecfaeefd5..c0b210f0a6e1d760ca9e058bec4d326f8ddef4fe 100644
--- a/cc/CCDirectRenderer.cpp
+++ b/cc/CCDirectRenderer.cpp
@@ -171,10 +171,10 @@ void CCDirectRenderer::drawRenderPass(DrawingFrame& frame, const CCRenderPass* r
     const CCQuadList& quadList = renderPass->quadList();
     for (CCQuadList::constBackToFrontIterator it = quadList.backToFrontBegin(); it != quadList.backToFrontEnd(); ++it) {
         FloatRect quadScissorRect = frame.scissorRectInRenderPassSpace;
-        quadScissorRect.intersect(it->get()->clippedRectInTarget());
+        quadScissorRect.intersect((*it)->clippedRectInTarget());
         if (!quadScissorRect.isEmpty()) {
             enableScissorTestRect(moveScissorToWindowSpace(frame, quadScissorRect));
-            drawQuad(frame, it->get());
+            drawQuad(frame, *it);
         }
     }