Open file:

D:\depot_tools\chromium\src\third_party\blink\renderer\core\core.gni

Change :

core_config_add += [ "//build/config/compiler:optimize_max" ]

To:

core_config_add += [ "//build/config/compiler:optimize_blink" ]

Open file:

D:\depot_tools\chromium\src\build\config\compiler\BUILD.gn

Add an optimize_blink somewhere in the optimization section starting around line 2100:

config("optimize_blink") {
  if (is_nacl && is_nacl_irt) {
    # The NaCl IRT is a special case and always wants its own config.
    # Various components do:
    #   if (!is_debug) {
    #     configs -= [ "//build/config/compiler:default_optimization" ]
    #     configs += [ "//build/config/compiler:optimize_max" ]
    #   }
    # So this config has to have the selection logic just like
    # "default_optimization", below.
    configs = [ "//build/config/nacl:irt_optimize" ]
  } else {
    ldflags = common_optimize_on_ldflags
    if (is_win) {
      # Favor speed over size, /O2 must be before the common flags. The GYP
      # build also specifies /Ot, /Oi, and /GF, but these are implied by /O2.
      cflags = [ "/O2" ] + common_optimize_on_cflags

      if (is_official_build) {
        if (!is_clang) {
          cflags += [ "/GL" ]  # Whole program optimization.
        }
        # TODO(crbug.com/598772): Enable -flto for Clang.
      }
    } else if (optimize_for_fuzzing) {
      cflags = [ "-O1" ] + common_optimize_on_cflags
    } else {
      cflags = [ "-O2" ] + common_optimize_on_cflags
    }
  }
}