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

gpu/command_buffer/service/context_state_impl_autogen.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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 283 matching lines @@
       }
     }
     if (feature_info_->feature_flags().oes_standard_derivatives) {
       if (prev_state->hint_fragment_shader_derivative !=
           hint_fragment_shader_derivative) {
         glHint(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES,
                hint_fragment_shader_derivative);
       }
     }
     if ((line_width != prev_state->line_width))
-      glLineWidth(line_width);
+      DoLineWidth(line_width);

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

The approach is reasonable, but this file is autogenerated. I think you need a
modification in the code generator to produce this.

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

Done.

     if (feature_info_->feature_flags().chromium_path_rendering) {
       if (memcmp(prev_state->modelview_matrix, modelview_matrix,
                  sizeof(GLfloat) * 16)) {
         glMatrixLoadfEXT(GL_PATH_MODELVIEW_CHROMIUM, modelview_matrix);
       }
     }
     if (feature_info_->feature_flags().chromium_path_rendering) {
       if (memcmp(prev_state->projection_matrix, projection_matrix,
                  sizeof(GLfloat) * 16)) {
         glMatrixLoadfEXT(GL_PATH_PROJECTION_CHROMIUM, projection_matrix);
@@ skipping 72 matching lines @@
     glDepthMask(cached_depth_mask);
     glDepthRange(z_near, z_far);
     glFrontFace(front_face);
     if (!feature_info_->gl_version_info().is_desktop_core_profile) {
       glHint(GL_GENERATE_MIPMAP_HINT, hint_generate_mipmap);
     }
     if (feature_info_->feature_flags().oes_standard_derivatives) {
       glHint(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES,
              hint_fragment_shader_derivative);
     }
-    glLineWidth(line_width);
+    DoLineWidth(line_width);
     if (feature_info_->feature_flags().chromium_path_rendering) {
       glMatrixLoadfEXT(GL_PATH_MODELVIEW_CHROMIUM, modelview_matrix);
     }
     if (feature_info_->feature_flags().chromium_path_rendering) {
       glMatrixLoadfEXT(GL_PATH_PROJECTION_CHROMIUM, projection_matrix);
     }
     if (feature_info_->feature_flags().chromium_path_rendering)
       glPathStencilFuncNV(stencil_path_func, stencil_path_ref,
                           stencil_path_mask);
     glPixelStorei(GL_PACK_ALIGNMENT, pack_alignment);
@@ skipping 914 matching lines @@
       *num_written = 1;
       if (params) {
         params[0] = static_cast<GLfloat>(enable_flags.sample_alpha_to_one_ext);
       }
       return true;
     default:
       return false;
   }
 }
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_IMPL_AUTOGEN_H_