Dart SDK Spelling b, c, and d.

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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.
 
 declare_args() {
   # The optimization level to use for debug builds.
   if (is_android) {
     # On Android we kind of optimize some things that don't affect debugging
     # much even when optimization is disabled to get the binary size down.
     debug_optimization_level = "s"
@@ skipping 72 matching lines @@
       "-fvisibility-inlines-hidden",
 
       # We need the frame pointer for CPU and heap profiling.
       "-fno-omit-frame-pointer",
     ]
     cflags_cc += common_flags
     cflags_objcc += common_flags
 
     # Linker warnings.
     if (current_cpu != "arm" && !is_mac) {
-      # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
+      # TODO(jochen): Enable this on ChromeOS on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
 
     # Common options for AddressSanitizer, LeakSanitizer, ThreadSanitizer and
     # MemorySanitizer
     if (using_sanitizer) {
       cflags += [ "-gline-tables-only" ]
     }
     if (is_asan) {
       cflags += [ "-fsanitize=address" ]
@@ skipping 682 matching lines @@
       cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
     }
     ldflags = [ "/DEBUG" ]
   } else {
     cflags = [
       "-g3",
       "-ggdb3",
     ]
   }
 }