Share GeometryMapper cache between pre-paint and compositing.

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.cpp

 // Copyright 2015 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 "platform/graphics/compositing/PaintArtifactCompositor.h"
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/playback/compositing_display_item.h"
@@ skipping 654 matching lines @@
       }
     }
     if (createNew)
       pendingLayers.push_back(PendingLayer(paintChunk));
   }
 }
 
 void PaintArtifactCompositor::update(
     const PaintArtifact& paintArtifact,
     RasterInvalidationTrackingMap<const PaintChunk>* rasterChunkInvalidations,
-    bool storeDebugInfo) {
+    bool storeDebugInfo,
+    GeometryMapper& geometryMapper) {
 #ifndef NDEBUG
   storeDebugInfo = true;
 #endif
 
   DCHECK(m_rootLayer);
 
   cc::LayerTree* layerTree = m_rootLayer->GetLayerTree();
 
   // The tree will be null after detaching and this update can be ignored.
   // See: WebViewImpl::detachPaintArtifactCompositor().
   if (!layerTree)
     return;
 
   if (m_extraDataForTestingEnabled)
     m_extraDataForTesting = WTF::wrapUnique(new ExtraDataForTesting);
 
   m_rootLayer->RemoveAllChildren();
   m_rootLayer->set_property_tree_sequence_number(
       PropertyTreeManager::kPropertyTreeSequenceNumber);
 
   PropertyTreeManager propertyTreeManager(*layerTree->property_trees(),
                                           m_rootLayer.get());
 
   Vector<PendingLayer, 0> pendingLayers;
-  GeometryMapper geometryMapper;
   collectPendingLayers(paintArtifact, pendingLayers, geometryMapper);
 
   Vector<std::unique_ptr<ContentLayerClientImpl>> newContentLayerClients;
   newContentLayerClients.reserveCapacity(paintArtifact.paintChunks().size());
   for (const PendingLayer& pendingLayer : pendingLayers) {
     gfx::Vector2dF layerOffset;
     scoped_refptr<cc::Layer> layer = compositedLayerForPendingLayer(
         paintArtifact, pendingLayer, layerOffset, newContentLayerClients,
         rasterChunkInvalidations, storeDebugInfo, geometryMapper);
 
@@ skipping 37 matching lines @@
 #ifndef NDEBUG
 void PaintArtifactCompositor::showDebugData() {
   LOG(ERROR) << layersAsJSON(LayerTreeIncludesDebugInfo)
                     ->toPrettyJSONString()
                     .utf8()
                     .data();
 }
 #endif
 
 }  // namespace blink