cc: Refactor SkipImageCanvas and create it during playback.

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index 90800f2d34cdc02567071bfbbe123078bfc8dad9..fd505af6d526cfc72194d3a6481a1a2ce9c2bfd5 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -459,8 +459,9 @@ TEST_F(PictureLayerImplTest, TileGridAlignment) {
   std::vector<SkRect>::const_iterator rect_iter = rects.begin();
   for (tile_iter = tiles.begin(); tile_iter < tiles.end(); tile_iter++) {
     MockCanvas mock_canvas(1000, 1000);
+    const bool include_images = true;
     updated_active_raster_source->PlaybackToSharedCanvas(
-        &mock_canvas, (*tile_iter)->content_rect(), 1.0f);
+        &mock_canvas, (*tile_iter)->content_rect(), 1.0f, include_images);
 
     // This test verifies that when drawing the contents of a specific tile
     // at content scale 1.0, the playback canvas never receives content from