Add more functionality to graphics3d test (more to follow...)

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc

 /*
  * Copyright (c) 2011 The Native Client 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 "native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.h"
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "native_client/src/shared/ppapi_proxy/command_buffer_nacl.h"
@@ skipping 128 matching lines @@
 
 }  // namespace
 
 __thread PP_Resource PluginGraphics3D::cached_graphics3d_id = 0;
 __thread gpu::gles2::GLES2Implementation*
   PluginGraphics3D::cached_implementation = NULL;
 
 PluginGraphics3D::PluginGraphics3D() : instance_id_(0) { }
 
 PluginGraphics3D::~PluginGraphics3D() {
+  DebugPrintf("PluginGraphics3D::~PluginGraphics3D()\n");
+  // Explicitly tear down scopted pointers; ordering below matters.
+  gles2_implementation_.reset();
+  gles2_helper_.reset();
+  command_buffer_.reset();
   // Invalidate the cache.
   cached_graphics3d_id = 0;
   cached_implementation = NULL;
 }
 
 // static
 gpu::gles2::GLES2Implementation* PluginGraphics3D::implFromResourceSlow(
     PP_Resource graphics3d_id) {
   DebugPrintf("PluginGraphics3D::implFromResourceSlow: "
               "resource=%"NACL_PRIu32"\n", graphics3d_id);
@@ skipping 71 matching lines @@
     &GetAttribs,
     &SetAttribs,
     &ResizeBuffers,
     &SwapBuffs,
   };
   return &intf;
 }
 
 }  // namespace ppapi_proxy