Revert of cc: Fix size_t to int truncations in layers/ output/ playback/ quads/

cc/playback/display_item_list.cc

Index: cc/playback/display_item_list.cc
diff --git a/cc/playback/display_item_list.cc b/cc/playback/display_item_list.cc
index d70df392351286d2a0e2bc1b60dd063e8bb3234a..2f1577aca4ca89a8cf6340cf1d1f851ef992488c 100644
--- a/cc/playback/display_item_list.cc
+++ b/cc/playback/display_item_list.cc
@@ -6,7 +6,6 @@
 
 #include <string>
 
-#include "base/numerics/safe_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/base/math_util.h"
@@ -206,7 +205,7 @@
   scoped_refptr<base::trace_event::TracedValue> state =
       new base::trace_event::TracedValue();
 
-  state->SetInteger("length", base::saturated_cast<int>(items_.size()));
+  state->SetInteger("length", items_.size());
   state->BeginArray("params.items");
   for (const DisplayItem* item : items_) {
     item->AsValueInto(state.get());