[wrapper-tracing] Fix tracing of WebGL2RenderingContextBase

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 
 #include "bindings/modules/v8/WebGLAny.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 4532 matching lines @@
   visitor->trace(m_boundIndexedUniformBuffers);
   visitor->trace(m_currentBooleanOcclusionQuery);
   visitor->trace(m_currentTransformFeedbackPrimitivesWrittenQuery);
   visitor->trace(m_currentElapsedQuery);
   visitor->trace(m_samplerUnits);
   visitor->trace(m_getBufferSubDataAsyncCallbacks);
   WebGLRenderingContextBase::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(WebGL2RenderingContextBase) {
-  if (isContextLost()) {
-    return;
-  }
-
   visitor->traceWrappers(m_transformFeedbackBinding);
   visitor->traceWrappers(m_readFramebufferBinding);
   visitor->traceWrappers(m_boundCopyReadBuffer);
   visitor->traceWrappers(m_boundCopyWriteBuffer);
   visitor->traceWrappers(m_boundPixelPackBuffer);
   visitor->traceWrappers(m_boundPixelUnpackBuffer);
   visitor->traceWrappers(m_boundTransformFeedbackBuffer);
   visitor->traceWrappers(m_boundUniformBuffer);
   for (auto& buf : m_boundIndexedTransformFeedbackBuffers) {
     visitor->traceWrappers(buf);
@@ skipping 291 matching lines @@
 
 void WebGL2RenderingContextBase::
     DrawingBufferClientRestorePixelUnpackBufferBinding() {
   if (!contextGL())
     return;
   contextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER,
                           objectOrZero(m_boundPixelUnpackBuffer.get()));
 }
 
 }  // namespace blink