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

cc/playback/display_item_list.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/playback/display_item_list.h"
 
 #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"
 #include "cc/debug/picture_debug_util.h"
 #include "cc/debug/traced_picture.h"
 #include "cc/debug/traced_value.h"
 #include "cc/playback/display_item_list_settings.h"
 #include "cc/playback/largest_display_item.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
@@ skipping 178 matching lines @@
   DCHECK_IMPLIES(use_cached_picture_, picture_);
   return picture_memory_usage_;
 }
 
 scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 DisplayItemList::AsValue() const {
   DCHECK(ProcessAppendedItemsCalled());
   scoped_refptr<base::trace_event::TracedValue> state =
       new base::trace_event::TracedValue();
 
-  state->SetInteger("length", items_.size());
+  state->SetInteger("length", base::saturated_cast<int>(items_.size()));
   state->BeginArray("params.items");
   for (const DisplayItem* item : items_) {
     item->AsValueInto(state.get());
   }
   state->EndArray();
   state->SetValue("params.layer_rect", MathUtil::AsValue(layer_rect_));
 
   if (!layer_rect_.IsEmpty()) {
     SkPictureRecorder recorder;
     SkCanvas* canvas =
@@ skipping 30 matching lines @@
     return;
 
   pixel_refs_->GatherPixelRefsFromPicture(picture_.get());
 }
 
 void* DisplayItemList::GetSidecar(DisplayItem* display_item) {
   return items_.GetSidecar(display_item);
 }
 
 }  // namespace cc