cc: Implement tile iteration order based on pyramid sequence. [old]

cc/tiles/tiling_set_raster_queue_required.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/tiles/tiling_set_raster_queue_required.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 94 matching lines @@
   // for occlusion, since the tile's internal state has not yet been updated.
   if (tile && tile->draw_info().NeedsRaster() &&
       !tiling_->IsTileOccluded(tile)) {
     current_tile_ = tiling_->MakePrioritizedTile(
         tile, tiling_->ComputePriorityRectTypeForTile(tile));
     return;
   }
   ++(*this);
 }
 
+TilingSetRasterQueueRequired::TilingIterator::TilingIterator(
+    const TilingSetRasterQueueRequired::TilingIterator& other) = default;
+
+TilingSetRasterQueueRequired::TilingIterator::TilingIterator(
+    TilingSetRasterQueueRequired::TilingIterator&& other) = default;
+
 TilingSetRasterQueueRequired::TilingIterator::~TilingIterator() {
 }
 
 TilingSetRasterQueueRequired::TilingIterator&
-    TilingSetRasterQueueRequired::TilingIterator::
-    operator++() {
+TilingSetRasterQueueRequired::TilingIterator::operator=(
+    const TilingSetRasterQueueRequired::TilingIterator& other) = default;
+
+TilingSetRasterQueueRequired::TilingIterator&
+TilingSetRasterQueueRequired::TilingIterator::operator=(
+    TilingSetRasterQueueRequired::TilingIterator&& other) = default;
+
+TilingSetRasterQueueRequired::TilingIterator&
+    TilingSetRasterQueueRequired::TilingIterator::operator++() {
   Tile* tile = nullptr;
   while (true) {
     ++visible_iterator_;
     if (!visible_iterator_) {
       current_tile_ = PrioritizedTile();
       return *this;
     }
     std::pair<int, int> next_index = visible_iterator_.index();
     tile = tiling_->TileAt(next_index.first, next_index.second);
     // If the tile doesn't exist or if it exists but doesn't need raster work,
@@ skipping 12 matching lines @@
     // in the NOW bin, which means that it can be required.
     break;
   }
 
   current_tile_ = tiling_->MakePrioritizedTile(
       tile, tiling_->ComputePriorityRectTypeForTile(tile));
   return *this;
 }
 
 }  // namespace cc