[SPv2] Stop recording paired display items (except for subsequence markers)

third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp b/third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp
index fbbbd00c3ba3e876b2f745e84678b92d738c42f4..086733692eb86a7c76ed5890b410747438cbb8c0 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/CompositingRecorder.cpp
@@ -19,12 +19,16 @@ CompositingRecorder::CompositingRecorder(GraphicsContext& graphicsContext,
                                          const FloatRect* bounds,
                                          ColorFilter colorFilter)
     : m_client(client), m_graphicsContext(graphicsContext) {
+  if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+    return;
   graphicsContext.getPaintController()
       .createAndAppend<BeginCompositingDisplayItem>(m_client, xferMode, opacity,
                                                     bounds, colorFilter);
 }
 
 CompositingRecorder::~CompositingRecorder() {
+  if (RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+    return;
   // If the end of the current display list is of the form
   // [BeginCompositingDisplayItem] [DrawingDisplayItem], then fold the
   // BeginCompositingDisplayItem into a new DrawingDisplayItem that replaces