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

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index de6cafdad516952df67f78ab451e578b7e29ac53..f96a5cc3475271862f5d8a3cb0a5f9866e1824ae 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -2377,22 +2377,6 @@ error::Error GLES2DecoderImpl::HandleIsTransformFeedback(
   return error::kNoError;
 }
 
-error::Error GLES2DecoderImpl::HandleLineWidth(uint32_t immediate_data_size,
-                                               const volatile void* cmd_data) {
-  const volatile gles2::cmds::LineWidth& c =
-      *static_cast<const volatile gles2::cmds::LineWidth*>(cmd_data);
-  GLfloat width = static_cast<GLfloat>(c.width);
-  if (width <= 0.0f || std::isnan(width)) {
-    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "LineWidth", "width out of range");
-    return error::kNoError;
-  }
-  if (state_.line_width != width) {
-    state_.line_width = width;
-    DoLineWidth(width);
-  }
-  return error::kNoError;
-}
-
 error::Error GLES2DecoderImpl::HandleLinkProgram(
     uint32_t immediate_data_size,
     const volatile void* cmd_data) {