[1/5] Pass transformed rasterization policy from Blink

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp

Index: third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp
diff --git a/third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp b/third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp
index 219d0f355aac039fbf5846da229643835c6f3ec9..232ee9c6be2c18b681499f0b59a1185406364783 100644
--- a/third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp
+++ b/third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp
@@ -435,6 +435,13 @@ void CompositedLayerMapping::updateContentsOpaque() {
   }
 }
 
+void CompositedLayerMapping::updateRasterizationPolicy() {
+  bool allowTransformedRasterization = !requiresCompositing(m_owningLayer.getCompositingReasons() & ~CompositingReasonSquashingDisallowed);
+  m_graphicsLayer->contentLayer()->setAllowTransformedRasterization(allowTransformedRasterization);
+  if (m_squashingLayer)
+    m_squashingLayer->contentLayer()->setAllowTransformedRasterization(true);
+}
+
 void CompositedLayerMapping::updateCompositedBounds() {
   ASSERT(m_owningLayer.compositor()->lifecycle().state() ==
          DocumentLifecycle::InCompositingUpdate);
@@ -997,6 +1004,7 @@ void CompositedLayerMapping::updateGraphicsLayerGeometry(
   updateElementIdAndCompositorMutableProperties();
   updateBackgroundPaintsOntoScrollingContentsLayer();
   updateContentsOpaque();
+  updateRasterizationPolicy();
   updateAfterPartResize();
   updateRenderingContext();
   updateShouldFlattenTransform();