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

gpu/command_buffer/service/context_state.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.
 
 // This file contains the ContextState class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
 
 #include <memory>
@@ skipping 148 matching lines @@
     k3D
   };
 
   ContextState(FeatureInfo* feature_info,
                ErrorStateClient* error_state_client,
                Logger* logger);
   ~ContextState();
 
   void Initialize();
 
+  void InitLineWidth(GLfloat min, GLfloat max);

[piman, 2016/11/07 22:34:40]

nit: maybe SetLineWidthBounds ?

[Lof, 2016/11/08 20:11:58]

Done.

+
   void SetIgnoreCachedStateForTest(bool ignore) {
     ignore_cached_state = ignore;
   }
 
   void RestoreState(const ContextState* prev_state);
   void InitCapabilities(const ContextState* prev_state) const;
   void InitState(const ContextState* prev_state) const;
 
   void RestoreActiveTexture() const;
   void RestoreAllTextureUnitBindings(const ContextState* prev_state) const;
   void RestoreActiveTextureUnitBinding(unsigned int target) const;
   void RestoreVertexAttribValues() const;
   void RestoreVertexAttribArrays(
       const scoped_refptr<VertexAttribManager> attrib_manager) const;
   void RestoreVertexAttribs() const;
   void RestoreBufferBindings() const;
   void RestoreGlobalState(const ContextState* prev_state) const;
   void RestoreProgramSettings(const ContextState* prev_state,
                               bool restore_transform_feedback_bindings) const;
   void RestoreRenderbufferBindings();
   void RestoreIndexedUniformBufferBindings(const ContextState* prev_state);
   void RestoreTextureUnitBindings(
       GLuint unit, const ContextState* prev_state) const;
 
   void PushTextureDecompressionUnpackState() const;
   void RestoreUnpackState() const;
+  void DoLineWidth(GLfloat width) const;
 
   // Helper for getting cached state.
   bool GetStateAsGLint(
       GLenum pname, GLint* params, GLsizei* num_written) const;
   bool GetStateAsGLfloat(
       GLenum pname, GLfloat* params, GLsizei* num_written) const;
   bool GetEnabled(GLenum cap) const;
 
   inline void SetDeviceColorMask(GLboolean red,
                                  GLboolean green,
@@ skipping 136 matching lines @@
 
   void InitStateManual(const ContextState* prev_state) const;
 
   bool framebuffer_srgb_;
 
   // Generic vertex attrib base types: FLOAT, INT, or UINT.
   // Each base type is encoded into 2 bits, the lowest 2 bits for location 0,
   // the highest 2 bits for location (max_vertex_attribs - 1).
   std::vector<uint32_t> generic_attrib_base_type_mask_;
 
+  GLfloat line_width_min_ = 0.0f;
+  GLfloat line_width_max_ = 1.0f;
+
   FeatureInfo* feature_info_;
   std::unique_ptr<ErrorState> error_state_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_