fix --show-composited-layer-borders on Mac

gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h

 // Copyright (c) 2012 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_BASE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_BASE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 730 matching lines @@
 
    private:
     GLuint bound_array_buffer_object_;
     GLuint bound_vertex_array_object_;
   };  // class MockGLStates
 
   void AddExpectationsForVertexAttribManager();
   void SetupMockGLBehaviors();
 
   void SetupInitStateManualExpectations(bool es3_capable);
+  void SetupInitStateManualExpectationsForDoLineWidth(GLfloat width);
 
   std::unique_ptr<::testing::StrictMock<MockCommandBufferEngine>> engine_;
   GpuPreferences gpu_preferences_;
   scoped_refptr<ContextGroup> group_;
   MockGLStates gl_states_;
   base::MessageLoop message_loop_;
 };
 
 class GLES2DecoderWithShaderTestBase : public GLES2DecoderTestBase {
  public:
@@ skipping 15 matching lines @@
     if (arg[i] != array[i])
       return false;
   }
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_BASE_H_