cc: Keep PaintImage in DrawImage.

cc/tiles/software_image_decode_cache_perftest.cc

Index: cc/tiles/software_image_decode_cache_perftest.cc
diff --git a/cc/tiles/software_image_decode_cache_perftest.cc b/cc/tiles/software_image_decode_cache_perftest.cc
index 0267f20d4f49c63db09905200679c600a75e14ab..6425598c73c068d8e47b59b06b3bcd23f66bb052 100644
--- a/cc/tiles/software_image_decode_cache_perftest.cc
+++ b/cc/tiles/software_image_decode_cache_perftest.cc
@@ -56,7 +56,9 @@ class SoftwareImageDecodeCachePerfTest : public testing::Test {
         auto& subrect = rect_subrect.second;
         for (auto& scale : scales) {
           images.emplace_back(
-              CreateImage(rect.width(), rect.height()), subrect, quality,
+              PaintImage(PaintImage::GetNextId(),
+                         CreateImage(rect.width(), rect.height())),
+              subrect, quality,
               CreateMatrix(SkSize::Make(scale.first, scale.second)),
               gfx::ColorSpace());
         }