Convert //cc from scoped_ptr to std::unique_ptr.

cc/quads/draw_polygon_unittest.cc

Index: cc/quads/draw_polygon_unittest.cc
diff --git a/cc/quads/draw_polygon_unittest.cc b/cc/quads/draw_polygon_unittest.cc
index eb6d1625986bd19dc12683f1fcd234522a8e1266..d70ef5c0142ffb87e991f59c2eb45007077e2014 100644
--- a/cc/quads/draw_polygon_unittest.cc
+++ b/cc/quads/draw_polygon_unittest.cc
@@ -260,8 +260,8 @@ TEST(DrawPolygonSplitTest, BasicSplit) {
 
   EXPECT_EQ(BSP_SPLIT, DrawPolygon::SideCompare(polygon_b, polygon_a));
 
-  scoped_ptr<DrawPolygon> front_polygon;
-  scoped_ptr<DrawPolygon> back_polygon;
+  std::unique_ptr<DrawPolygon> front_polygon;
+  std::unique_ptr<DrawPolygon> back_polygon;
   polygon_b.Split(polygon_a, &front_polygon, &back_polygon);
   EXPECT_EQ(BSP_FRONT, DrawPolygon::SideCompare(*front_polygon, polygon_a));
   EXPECT_EQ(BSP_BACK, DrawPolygon::SideCompare(*back_polygon, polygon_a));
@@ -304,8 +304,8 @@ TEST(DrawPolygonSplitTest, AngledSplit) {
 
   EXPECT_EQ(BSP_SPLIT, DrawPolygon::SideCompare(polygon_a, polygon_b));
 
-  scoped_ptr<DrawPolygon> front_polygon;
-  scoped_ptr<DrawPolygon> back_polygon;
+  std::unique_ptr<DrawPolygon> front_polygon;
+  std::unique_ptr<DrawPolygon> back_polygon;
   polygon_a.Split(polygon_b, &front_polygon, &back_polygon);
   EXPECT_EQ(BSP_FRONT, DrawPolygon::SideCompare(*front_polygon, polygon_b));
   EXPECT_EQ(BSP_BACK, DrawPolygon::SideCompare(*back_polygon, polygon_b));