Track slow paths in DisplayItemList

cc/paint/display_item_list.h

Index: cc/paint/display_item_list.h
diff --git a/cc/paint/display_item_list.h b/cc/paint/display_item_list.h
index 893dc9fbc4f1e111705acaec524bdf8fe453ebd8..5aa1490336e2fb5a3b56ae8d7f103f8a07e4b8b2 100644
--- a/cc/paint/display_item_list.h
+++ b/cc/paint/display_item_list.h
@@ -125,10 +125,8 @@ class CC_PAINT_EXPORT DisplayItemList
   // applicable, create an internally cached SkPicture.
   void Finalize();
 
-  void SetIsSuitableForGpuRasterization(bool is_suitable) {
-    all_items_are_suitable_for_gpu_rasterization_ = is_suitable;
-  }
-  bool IsSuitableForGpuRasterization() const;
+  void SetNumSlowPaths(int num_slow_paths) { num_slow_paths_ = num_slow_paths; }
+  int NumSlowPaths() const { return num_slow_paths_; }
 
   size_t OpCount() const;
   size_t ApproximateMemoryUsage() const;
@@ -200,7 +198,7 @@ class CC_PAINT_EXPORT DisplayItemList
   std::vector<size_t> begin_item_indices_;
 
   size_t op_count_ = 0u;
-  bool all_items_are_suitable_for_gpu_rasterization_ = true;
+  int num_slow_paths_ = 0;
   // For testing purposes only. Whether to keep visual rects across calls to
   // Finalize().
   bool retain_visual_rects_ = false;