cc: Remove deprecated DisplayItemList::Raster overload.

cc/paint/display_item_list_unittest.cc

Index: cc/paint/display_item_list_unittest.cc
diff --git a/cc/paint/display_item_list_unittest.cc b/cc/paint/display_item_list_unittest.cc
index b166229c6624607acc70823604748d344496fa65..519768800c0dc89ab66157f37eb939475bc462a7 100644
--- a/cc/paint/display_item_list_unittest.cc
+++ b/cc/paint/display_item_list_unittest.cc
@@ -732,7 +732,7 @@ TEST(DisplayItemListTest, SaveDrawRestore) {
   list->Finalize();
 
   SaveCountingCanvas canvas;
-  list->Raster(&canvas, nullptr);
+  list->Raster(&canvas);
 
   EXPECT_EQ(0, canvas.save_count_);
   EXPECT_EQ(0, canvas.restore_count_);
@@ -761,7 +761,7 @@ TEST(DisplayItemListTest, SaveRestoreNoops) {
   list->Finalize();
 
   SaveCountingCanvas canvas;
-  list->Raster(&canvas, nullptr);
+  list->Raster(&canvas);
 
   EXPECT_EQ(0, canvas.save_count_);
   EXPECT_EQ(0, canvas.restore_count_);
@@ -782,7 +782,7 @@ TEST(DisplayItemListTest, SaveDrawRestoreFail_BadSaveFlags) {
   list->Finalize();
 
   SaveCountingCanvas canvas;
-  list->Raster(&canvas, nullptr);
+  list->Raster(&canvas);
 
   EXPECT_EQ(1, canvas.save_count_);
   EXPECT_EQ(1, canvas.restore_count_);
@@ -816,7 +816,7 @@ TEST(DisplayItemListTest, SaveDrawRestoreFail_TooManyOps) {
   list->Finalize();
 
   SaveCountingCanvas canvas;
-  list->Raster(&canvas, nullptr);
+  list->Raster(&canvas);
 
   EXPECT_EQ(1, canvas.save_count_);
   EXPECT_EQ(1, canvas.restore_count_);