Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGLSampler.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/WebGLSampler.h"
 
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 
 namespace blink {
 
 WebGLSampler* WebGLSampler::create(WebGL2RenderingContextBase* ctx) {
   return new WebGLSampler(ctx);
 }
 
-WebGLSampler::~WebGLSampler() {
-  // See the comment in WebGLObject::detachAndDeleteObject().
-  detachAndDeleteObject();
-}
-
 WebGLSampler::WebGLSampler(WebGL2RenderingContextBase* ctx)
     : WebGLSharedPlatform3DObject(ctx) {
   GLuint sampler;
   ctx->contextGL()->GenSamplers(1, &sampler);
   setObject(sampler);
 }
 
+WebGLSampler::~WebGLSampler() {
+  runDestructor();
+}
+
 void WebGLSampler::deleteObjectImpl(gpu::gles2::GLES2Interface* gl) {
   gl->DeleteSamplers(1, &m_object);
   m_object = 0;
 }
 
 }  // namespace blink