The names are too long and contain implementation details for historical reasons.

Here's a proposal:
mac_chromium_compile_dbg_ng   -> mac_compile_dbg
mac_chromium_rel_ng   -> mac_rel
ios-simulator   
linux_android_rel_ng   -> android_rel
ios-device   
android_n5x_swarming_rel   -> android_n5x_rel   
cast_shell_android   
android_cronet   
android_compile_dbg   
android_clang_dbg_recipe   -> android_clang_dbg
android_arm64_dbg_recipe   -> android_arm64_dbg
win_chromium_rel_ng   -> win_rel
win_clang   
win_chromium_x64_rel_ng   -> win_x64_rel   
win_chromium_compile_dbg_ng   -> win_compile_dbg   
linux_chromium_compile_dbg_ng   -> linux_compile_dbg
linux_chromium_rel_ng   -> linux_rel
linux_chromium_chromeos_rel_ng   -> linux_chromeos_rel
linux_chromium_clobber_rel_ng   -> linux_clobber_rel
linux_chromium_chromeos_ozone_rel_ng   -> linux_chromeos_ozone_rel
linux_chromium_chromeos_compile_dbg_ng   -> linux_chromeos_compile_dbg
linux_chromium_asan_rel_ng   -> linux_asan_rel
chromeos_daisy_chromium_compile_only_ng   -> chromeos_daisy_compile
chromeos_x86-generic_chromium_compile_only_ng   -> chromeos_x86-generic_compile
cast_shell_linux   
chromeos_amd64-generic_chromium_compile_only_ng  -> chromeos_amd64-generic_compile