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

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 3354 matching lines @@
   if (!InitializeShaderTranslator()) {
     return false;
   }
 
   GLint viewport_params[4] = { 0 };
   glGetIntegerv(GL_MAX_VIEWPORT_DIMS, viewport_params);
   viewport_max_width_ = viewport_params[0];
   viewport_max_height_ = viewport_params[1];
 
   glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, line_width_range_);
+  state_.SetLineWidthBounds(line_width_range_[0], line_width_range_[1]);
 
   state_.scissor_width = state_.viewport_width;
   state_.scissor_height = state_.viewport_height;
 
   // Set all the default state because some GL drivers get it wrong.
   state_.InitCapabilities(NULL);
   state_.InitState(NULL);
 
   // Default state must be set before offscreen resources can be created.
   if (offscreen) {
@@ skipping 15401 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu