On Mac, there's a build step to verify the symbol table order of the chrome_framework target. When enabling that build step, I noticed the following is failing:

python ../../build/gn_run_binary.py ../../chrome/tools/build/mac/verify_order _ChromeMain Google\ Chrome\ Framework.framework/Google\ Chrome\ Framework
./../../chrome/tools/build/mac/verify_order: unordered symbols in Google Chrome Framework.framework/Google Chrome Framework:
_InitCommandLineArgs
_InitializeBase
ninja: build stopped: subcommand failed.

I tracked those symbols down to //services/shell/public/cpp:init_commandline. GYP does not have this problem, because the GYP targets do not have those files in their build.

I do notice that there is  //services/shell/public/cpp:cpp_for_chromium but I don't see many dependencies on that. I do see several on the :cpp target, which includes :init_commandline though.

Some sample paths:

//chrome:chrome --[private]-->
//chrome:chrome_app --[private]-->
//chrome:chrome_versioned_bundle_data --[public]-->
//chrome:verify_chrome_framework_order --[public]-->
//chrome:chrome_framework --[public]-->
//chrome:chrome_dll --[private]-->
//content/public/app:both --[private]-->
//content/public/common:common_sources --[private]-->
//services/shell/public/cpp:cpp --[public]-->
//services/shell/public/cpp:init_commandline

//chrome:chrome --[private]-->
//chrome:chrome_app --[private]-->
//chrome:chrome_versioned_bundle_data --[public]-->
//chrome:verify_chrome_framework_order --[public]-->
//chrome:chrome_framework --[public]-->
//chrome:chrome_dll --[private]-->
//content/public/app:both --[private]-->
//content/public/common:common_sources --[public]-->
//content/common:common --[private]-->
//services/shell/public/cpp:cpp --[public]-->
//services/shell/public/cpp:init_commandline

//chrome:chrome --[private]-->
//chrome:chrome_app --[private]-->
//chrome:chrome_versioned_bundle_data --[public]-->
//chrome:verify_chrome_framework_order --[public]-->
//chrome:chrome_framework --[public]-->
//chrome:chrome_dll --[private]-->
//content/public/app:both --[private]-->
//content/public/renderer:renderer_sources --[private]-->
//content/renderer:renderer --[private]-->
//services/shell/public/cpp:cpp --[public]-->
//services/shell/public/cpp:init_commandline

... etc. I'm not enough of a Mojo expert to know what the right solution is here.