Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLSharedObject.h

 /*
  * Copyright (C) 2011 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGLSharedObject_h
 #define WebGLSharedObject_h
 
+#include "bindings/core/v8/TraceWrapperMember.h"
 #include "modules/webgl/WebGLObject.h"
 
 namespace blink {
 
 class WebGLContextGroup;
 class WebGLRenderingContextBase;
 
-// WebGLSharedObject the base class for objects that can be shared by multiple
-// WebGLRenderingContexts.
+// WebGLSharedObject is the base class for objects that can be shared by
+// multiple WebGLRenderingContexts.
 class WebGLSharedObject : public WebGLObject {
  public:
-  ~WebGLSharedObject() override;
-
   WebGLContextGroup* contextGroup() const { return m_contextGroup; }
 
   virtual bool isBuffer() const { return false; }
   virtual bool isProgram() const { return false; }
   virtual bool isQuery() const { return false; }
   virtual bool isRenderbuffer() const { return false; }
   virtual bool isSampler() const { return false; }
   virtual bool isShader() const { return false; }
   virtual bool isSync() const { return false; }
   virtual bool isTexture() const { return false; }
   virtual bool isTransformFeedback() const { return false; }
 
   bool validate(const WebGLContextGroup* contextGroup,
-                const WebGLRenderingContextBase*) const final {
-    return contextGroup == m_contextGroup;
-  }
+                const WebGLRenderingContextBase*) const final;
 
-  void detachContextGroup();
+  DECLARE_VIRTUAL_TRACE();
+
+  DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
  protected:
   explicit WebGLSharedObject(WebGLRenderingContextBase*);
 
   bool hasGroupOrContext() const final { return m_contextGroup; }
 
+  uint32_t currentNumberOfContextLosses() const final;
+
   gpu::gles2::GLES2Interface* getAGLInterface() const final;
 
  private:
-  WebGLContextGroup* m_contextGroup;
+  TraceWrapperMember<WebGLContextGroup> m_contextGroup;
 };
 
 }  // namespace blink
 
 #endif  // WebGLSharedObject_h