gpu: Cleanup class/struct forward declarations

gpu/command_buffer/service/gles2_cmd_decoder_unittest.h

 // Copyright 2014 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_H_
 
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/service/framebuffer_manager.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/gles2_cmd_decoder_unittest_base.h"
 #include "gpu/command_buffer/service/program_manager.h"
 #include "gpu/command_buffer/service/query_manager.h"
 #include "gpu/command_buffer/service/renderbuffer_manager.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "gpu/command_buffer/service/test_helper.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "gpu/command_buffer/service/vertex_array_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_context_stub_with_extensions.h"
 #include "ui/gl/gl_mock.h"
 #include "ui/gl/gl_surface_stub.h"
 
-namespace base {
-class CommandLine;
-}
-
 namespace gpu {
 namespace gles2 {
 
 class GLES2DecoderTest : public GLES2DecoderTestBase {
  public:
   GLES2DecoderTest() {}
 
  protected:
   void CheckReadPixelsOutOfRange(GLint in_read_x,
                                  GLint in_read_y,
@@ skipping 57 matching lines @@
 
 class GLES3DecoderManualInitTest : public GLES2DecoderManualInitTest {
  public:
   GLES3DecoderManualInitTest() { shader_language_version_ = 300; }
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_H_