Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLTransformFeedback.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/WebGLTransformFeedback.h"
 
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 
 namespace blink {
 
 WebGLTransformFeedback* WebGLTransformFeedback::create(
     WebGL2RenderingContextBase* ctx) {
   return new WebGLTransformFeedback(ctx);
 }
 
-WebGLTransformFeedback::~WebGLTransformFeedback() {
-  // See the comment in WebGLObject::detachAndDeleteObject().
-  detachAndDeleteObject();
-}
-
 WebGLTransformFeedback::WebGLTransformFeedback(WebGL2RenderingContextBase* ctx)
     : WebGLSharedPlatform3DObject(ctx), m_target(0), m_program(nullptr) {
   GLuint tf;
   ctx->contextGL()->GenTransformFeedbacks(1, &tf);
   setObject(tf);
 }
 
+WebGLTransformFeedback::~WebGLTransformFeedback() {
+  runDestructor();
+}
+
 void WebGLTransformFeedback::deleteObjectImpl(gpu::gles2::GLES2Interface* gl) {
   gl->DeleteTransformFeedbacks(1, &m_object);
   m_object = 0;
 }
 
 void WebGLTransformFeedback::setTarget(GLenum target) {
   if (m_target)
     return;
   if (target == GL_TRANSFORM_FEEDBACK)
     m_target = target;
 }
 
 void WebGLTransformFeedback::setProgram(WebGLProgram* program) {
   m_program = program;
 }
 
 DEFINE_TRACE(WebGLTransformFeedback) {
   visitor->trace(m_program);
   WebGLSharedPlatform3DObject::trace(visitor);
 }
 
 }  // namespace blink