Use Custome ListContainer to Allocate SharedQuadState

cc/surfaces/surface_aggregator_test_helpers.cc

Index: cc/surfaces/surface_aggregator_test_helpers.cc
diff --git a/cc/surfaces/surface_aggregator_test_helpers.cc b/cc/surfaces/surface_aggregator_test_helpers.cc
index 8ecf89efe065fecb3466365b84db583963e49a42..8afead151b1f18f01f1dd96ef2688ba003f86fd3 100644
--- a/cc/surfaces/surface_aggregator_test_helpers.cc
+++ b/cc/surfaces/surface_aggregator_test_helpers.cc
@@ -134,13 +134,11 @@ void TestQuadMatchesExpectations(Quad expected_quad, const DrawQuad* quad) {
 
 void TestPassMatchesExpectations(Pass expected_pass, const RenderPass* pass) {
   ASSERT_EQ(expected_pass.quad_count, pass->quad_list.size());
-  size_t i = 0;
   for (QuadList::ConstIterator iter = pass->quad_list.begin();
        iter != pass->quad_list.end();
        ++iter) {
-    SCOPED_TRACE(base::StringPrintf("Quad number %" PRIuS, i));
-    TestQuadMatchesExpectations(expected_pass.quads[i], &*iter);
-    ++i;
+    SCOPED_TRACE(base::StringPrintf("Quad number %" PRIuS, iter.index()));
+    TestQuadMatchesExpectations(expected_pass.quads[iter.index()], &*iter);
   }
 }