GPUProcessor uses O3D command buffer service to render to a window....

o3d/gpu_plugin/gpu_plugin_object_unittest.cc

 // Copyright (c) 2006-2008 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 "o3d/gpu_plugin/command_buffer_mock.h"
 #include "o3d/gpu_plugin/gpu_plugin_object.h"
 #include "o3d/gpu_plugin/np_utils/np_browser_mock.h"
 #include "o3d/gpu_plugin/np_utils/np_object_mock.h"
 #include "o3d/gpu_plugin/np_utils/np_object_pointer.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 88 matching lines @@
   EXPECT_EQ(NPERR_GENERIC_ERROR, plugin_object_->SetWindow(&window));
 }
 
 TEST_F(GPUPluginObjectTest, CanGetScriptableNPObject) {
   EXPECT_EQ(plugin_object_.Get(), plugin_object_->GetScriptableNPObject());
 }
 
 TEST_F(GPUPluginObjectTest, OpenCommandBufferReturnsInitializedCommandBuffer) {
   // Intercept creation of command buffer object and return mock.
   NPObjectPointer<MockCommandBuffer> command_buffer =
-      NPCreateObject<StrictMock<MockCommandBuffer> >(NULL);
+      NPCreateObject<MockCommandBuffer>(NULL);
   EXPECT_CALL(mock_browser_, CreateObject(NULL,
       NPGetClass<CommandBuffer>()))
     .WillOnce(Return(command_buffer.ToReturned()));
 
   EXPECT_CALL(*command_buffer.Get(), Initialize(1024))
     .WillOnce(Return(true));
 
   EXPECT_CALL(*command_buffer.Get(), SetPutOffsetChangeCallback(NotNull()));
 
   EXPECT_EQ(NPERR_NO_ERROR, plugin_object_->New("application/foo",
@@ skipping 28 matching lines @@
                                                 NULL,
                                                 NULL,
                                                 NULL));
 
   EXPECT_EQ(NPObjectPointer<NPObject>(), plugin_object_->OpenCommandBuffer());
 
   EXPECT_EQ(NPERR_NO_ERROR, plugin_object_->Destroy(NULL));
 }
 }  // namespace gpu_plugin
 }  // namespace o3d