[wrapper-tracing] Add tracing to WebGLRenderingContextBase and friends

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

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 7443 matching lines @@
   visitor->trace(m_defaultVertexArrayObject);
   visitor->trace(m_boundVertexArrayObject);
   visitor->trace(m_currentProgram);
   visitor->trace(m_framebufferBinding);
   visitor->trace(m_renderbufferBinding);
   visitor->trace(m_textureUnits);
   visitor->trace(m_extensions);
   CanvasRenderingContext::trace(visitor);
 }
 
+DEFINE_TRACE_WRAPPERS(WebGLRenderingContextBase) {
+  if (isContextLost()) {
+    return;
+  }
+  visitor->traceWrappers(m_boundArrayBuffer);
+  visitor->traceWrappers(m_renderbufferBinding);
+  visitor->traceWrappers(m_framebufferBinding);
+  visitor->traceWrappers(m_currentProgram);
+  visitor->traceWrappers(m_boundVertexArrayObject);
+  for (auto& unit : m_textureUnits) {
+    visitor->traceWrappers(unit.m_texture2DBinding);
+    visitor->traceWrappers(unit.m_textureCubeMapBinding);
+    visitor->traceWrappers(unit.m_texture3DBinding);
+    visitor->traceWrappers(unit.m_texture2DArrayBinding);
+  }
+  for (ExtensionTracker* tracker : m_extensions) {
+    WebGLExtension* extension = tracker->getExtensionObjectIfAlreadyEnabled();
+    visitor->traceWrappers(extension);
+  }
+  CanvasRenderingContext::traceWrappers(visitor);
+}
+
 int WebGLRenderingContextBase::externallyAllocatedBytesPerPixel() {
   if (isContextLost())
     return 0;
 
   int bytesPerPixel = 4;
   int totalBytesPerPixel =
       bytesPerPixel * 2;  // WebGL's front and back color buffers.
   int samples = drawingBuffer() ? drawingBuffer()->sampleCount() : 0;
   Nullable<WebGLContextAttributes> attribs;
   getContextAttributes(attribs);
@@ skipping 32 matching lines @@
 
 void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(
     HTMLCanvasElementOrOffscreenCanvas& result) const {
   if (canvas())
     result.setHTMLCanvasElement(canvas());
   else
     result.setOffscreenCanvas(getOffscreenCanvas());
 }
 
 }  // namespace blink