gl_tests: Use zero size gl surface for offscreen rendering

gpu/command_buffer/service/gpu_scheduler_unittest.cc

 // Copyright (c) 2011 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 "base/message_loop/message_loop.h"
 #include "gpu/command_buffer/common/command_buffer_mock.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_mock.h"
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 #include "gpu/command_buffer/service/mocks.h"
@@ skipping 57 matching lines @@
     base::MessageLoop::current()->RunUntilIdle();
   }
 
   error::Error GetError() {
     return command_buffer_->GetLastState().error;
   }
 
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool autorelease_pool_;
 #endif
+#if !defined(USE_OZONE)
   base::MessageLoop message_loop;
+#endif
   scoped_ptr<MockCommandBuffer> command_buffer_;
   scoped_refptr<Buffer> shared_memory_buffer_;
   int32* buffer_;
   scoped_ptr<gles2::MockGLES2Decoder> decoder_;
   scoped_ptr<GpuScheduler> scheduler_;
 };
 
 TEST_F(GpuSchedulerTest, SchedulerDoesNothingIfRingBufferIsEmpty) {
   CommandBuffer::State state;
 
@@ skipping 125 matching lines @@
 
   EXPECT_EQ(kRingBufferSize, scheduler_->GetSharedMemoryBuffer(7)->size());
 }
 
 TEST_F(GpuSchedulerTest, SetTokenForwardsToCommandBuffer) {
   EXPECT_CALL(*command_buffer_, SetToken(7));
   scheduler_->set_token(7);
 }
 
 }  // namespace gpu