Handle exception when user call canvas.transferControlToOffscreen() twice

third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp

Index: third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp
diff --git a/third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp b/third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp
index 4c30861ef7c573338193634985326ede43e9da06..29baee4a7f7ad88d864b5d997bfea841915e91e3 100644
--- a/third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp
+++ b/third_party/WebKit/Source/modules/canvas/HTMLCanvasElementModule.cpp
@@ -37,6 +37,13 @@ void HTMLCanvasElementModule::getContext(
 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(
     HTMLCanvasElement& canvas,
     ExceptionState& exceptionState) {
+  if (canvas.surfaceLayerBridge()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "Cannot transfer control from a canvas for more than one time.");
+    return nullptr;
+  }
+
   if (!canvas.createSurfaceLayer()) {
     exceptionState.throwDOMException(
         V8Error,