cc: More consistent reasoning about display list memory usage.

cc/debug/rasterize_and_record_benchmark.cc

Index: cc/debug/rasterize_and_record_benchmark.cc
diff --git a/cc/debug/rasterize_and_record_benchmark.cc b/cc/debug/rasterize_and_record_benchmark.cc
index bed367dd6fee8f7c786881b94cb131a3f5cad2e7..b474e431fd2d3f42d5024af2e9a11e02d4f09340 100644
--- a/cc/debug/rasterize_and_record_benchmark.cc
+++ b/cc/debug/rasterize_and_record_benchmark.cc
@@ -223,9 +223,9 @@ void RasterizeAndRecordBenchmark::RunOnDisplayListLayer(
 
         if (memory_used) {
           // Verify we are recording the same thing each time.
-          DCHECK(memory_used == display_list->PictureMemoryUsage());
+          DCHECK_EQ(memory_used, display_list->ApproximateMemoryUsage());
         } else {
-          memory_used = display_list->PictureMemoryUsage();
+          memory_used = display_list->ApproximateMemoryUsage();
         }
 
         timer.NextLap();