Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/EXTDisjointTimerQueryWebGL2.cpp

 // Copyright 2016 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/EXTDisjointTimerQueryWebGL2.h"
 
 #include "bindings/modules/v8/WebGLAny.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 
 namespace blink {
 
-EXTDisjointTimerQueryWebGL2::~EXTDisjointTimerQueryWebGL2() {}
-
 WebGLExtensionName EXTDisjointTimerQueryWebGL2::name() const {
   return EXTDisjointTimerQueryWebGL2Name;
 }
 
 EXTDisjointTimerQueryWebGL2* EXTDisjointTimerQueryWebGL2::create(
     WebGLRenderingContextBase* context) {
   EXTDisjointTimerQueryWebGL2* o = new EXTDisjointTimerQueryWebGL2(context);
   return o;
 }
 
@@ skipping 44 matching lines @@
 }
 
 EXTDisjointTimerQueryWebGL2::EXTDisjointTimerQueryWebGL2(
     WebGLRenderingContextBase* context)
     : WebGLExtension(context) {
   context->extensionsUtil()->ensureExtensionEnabled(
       "GL_EXT_disjoint_timer_query_webgl2");
 }
 
 }  // namespace blink