Submit Compositor Frame from OffscreenCanvas on main

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp

Index: third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
diff --git a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
index b5f8febd6e7bfcd7f93520e4634a53b70aa5fd7f..bc502f645cbb1fd066ec90a6e7f393b541eca0c8 100644
--- a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
+++ b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
@@ -9,6 +9,7 @@
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
 #include "platform/graphics/ImageBuffer.h"
+#include "platform/graphics/OffscreenCanvasFrameDispatcherImpl.h"
 #include "wtf/MathExtras.h"
 #include <memory>
 
@@ -134,6 +135,13 @@ bool OffscreenCanvas::isPaintable() const
     return m_context->isPaintable();
 }
 
+OffscreenCanvasFrameDispatcher* OffscreenCanvas::getOrCreateFrameDispatcher()
+{
+    if (!m_frameDispatcher)
+        m_frameDispatcher = wrapUnique(new OffscreenCanvasFrameDispatcherImpl(m_clientId, m_localId, m_nonce, width(), height()));
+    return m_frameDispatcher.get();
+}
+
 DEFINE_TRACE(OffscreenCanvas)
 {
     visitor->trace(m_context);