cc: Remove tile sharing from tilings.

cc/resources/tile_manager.cc

 // Copyright 2012 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/resources/tile_manager.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 779 matching lines @@
       client_->BuildRasterQueue(global_state_.tree_priority, type));
   // It is insufficient to check whether the raster queue we constructed is
   // empty. The reason for this is that there are situations (rasterize on
   // demand) when the tile both needs raster and it's ready to draw. Hence, we
   // have to iterate the queue to check whether the required tiles are ready to
   // draw.
   for (; !raster_priority_queue->IsEmpty(); raster_priority_queue->Pop()) {
     if (!raster_priority_queue->Top()->IsReadyToDraw())
       return false;
   }
+
+#if DCHECK_IS_ON()
+  scoped_ptr<RasterTilePriorityQueue> all_queue(
+      client_->BuildRasterQueue(global_state_.tree_priority, type));
+  for (; !all_queue->IsEmpty(); all_queue->Pop()) {
+    auto* tile = all_queue->Top();
+    DCHECK_IMPLIES(tile->required_for_activation(), tile->IsReadyToDraw());
+  }
+#endif
   return true;
 }
 bool TileManager::IsReadyToActivate() const {
   TRACE_EVENT0("cc", "TileManager::IsReadyToActivate");
   return AreRequiredTilesReadyToDraw(
       RasterTilePriorityQueue::Type::REQUIRED_FOR_ACTIVATION);
 }
 
 bool TileManager::IsReadyToDraw() const {
   TRACE_EVENT0("cc", "TileManager::IsReadyToDraw");
@@ skipping 157 matching lines @@
   result -= other;
   return result;
 }
 
 bool TileManager::MemoryUsage::Exceeds(const MemoryUsage& limit) const {
   return memory_bytes_ > limit.memory_bytes_ ||
          resource_count_ > limit.resource_count_;
 }
 
 }  // namespace cc