Draw recorded content directly into the containing PaintCanvas, when possible.

third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h

Index: third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h b/third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h
index 6c3e231570a29e088f7de172915e7f0bf7a3bc17..2d27e26ef38dc9e8028a0353cdc6da4b6df26d2d 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/PaintRecordBuilder.h
@@ -10,6 +10,7 @@
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
+#include "platform/graphics/paint/PaintCanvas.h"
 #include "platform/graphics/paint/PaintRecord.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "wtf/Noncopyable.h"
@@ -52,6 +53,9 @@ class PLATFORM_EXPORT PaintRecordBuilder final : public DisplayItemClient {
   // into PropertyTreeState::root() space.
   sk_sp<PaintRecord> endRecording();
 
+  // Replays the recording directly into the given canvas.
+  void endRecording(PaintCanvas&);
+
   // DisplayItemClient methods
   String debugName() const final { return "PaintRecordBuilder"; }
   LayoutRect visualRect() const final { return LayoutRect(); }