Synchronize OffscreenCanvas content with the placeholder canvas

third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp
index a891e84154d7fc68777ffb5ae9eef2f5c63f9781..337c700e02b2c7c5f1e79504be3f183bc0036516 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.cpp
@@ -1327,7 +1327,7 @@ ScriptValueSerializer::writeTransferredOffscreenCanvas(
                        next);
   m_writer.writeTransferredOffscreenCanvas(
       offscreenCanvas->width(), offscreenCanvas->height(),
-      offscreenCanvas->getAssociatedCanvasId(), offscreenCanvas->clientId(),
+      offscreenCanvas->placeholderCanvasId(), offscreenCanvas->clientId(),
       offscreenCanvas->sinkId(), offscreenCanvas->localId(),
       offscreenCanvas->nonce());
   return nullptr;
@@ -2596,7 +2596,7 @@ bool ScriptValueDeserializer::tryGetTransferredOffscreenCanvas(
     uint64_t nonce,
     v8::Local<v8::Value>* object) {
   OffscreenCanvas* offscreenCanvas = OffscreenCanvas::create(width, height);
-  offscreenCanvas->setAssociatedCanvasId(canvasId);
+  offscreenCanvas->setPlaceholderCanvasId(canvasId);
   offscreenCanvas->setSurfaceId(clientId, sinkId, localId, nonce);
   *object = toV8(offscreenCanvas, m_reader.getScriptState());
   if ((*object).IsEmpty())