Only use gcc_compile_wrapper when resource whitelisting is enabled.

build/toolchain/gcc_toolchain.gni

 # 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/clang/clang.gni")
 import("//build/config/nacl/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 import("//build/toolchain/cc_wrapper.gni")
@@ skipping 203 matching lines @@
     }
 
     # These library switches can apply to all tools below.
     lib_switch = "-l"
     lib_dir_switch = "-L"
 
     # Object files go in this directory.
     object_subdir = "{{target_out_dir}}/{{label_name}}"
 
     tool("cc") {
-      whitelist_flag = " "
-      if (enable_resource_whitelist_generation) {
-        whitelist_flag = " --resource-whitelist=\"{{output}}.whitelist\""
-      }
       depfile = "{{output}}.d"
       command = "$cc -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{cflags}} {{cflags_c}}${extra_cppflags}${extra_cflags} -c {{source}} -o {{output}}"
       depsformat = "gcc"
       description = "CC {{output}}"
       outputs = [
         # The whitelist file is also an output, but ninja does not
         # currently support multiple outputs for tool("cc").
         "$object_subdir/{{source_name_part}}.o",
       ]
-      compile_wrapper = rebase_path("//build/toolchain/gcc_compile_wrapper.py",
-                                    root_build_dir)
-      command = "$python_path \"$compile_wrapper\"$whitelist_flag $command"
+      if (enable_resource_whitelist_generation) {
+        compile_wrapper =
+            rebase_path("//build/toolchain/gcc_compile_wrapper.py",
+                        root_build_dir)
+        command = "$python_path \"$compile_wrapper\" --resource-whitelist=\"{{output}}.whitelist\" $command"
+      }
     }
 
     tool("cxx") {
-      whitelist_flag = " "
-      if (enable_resource_whitelist_generation) {
-        whitelist_flag = " --resource-whitelist=\"{{output}}.whitelist\""
-      }
       depfile = "{{output}}.d"
       command = "$cxx -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}${extra_cppflags}${extra_cxxflags} -c {{source}} -o {{output}}"
       depsformat = "gcc"
       description = "CXX {{output}}"
       outputs = [
         # The whitelist file is also an output, but ninja does not
         # currently support multiple outputs for tool("cxx").
         "$object_subdir/{{source_name_part}}.o",
       ]
-      compile_wrapper = rebase_path("//build/toolchain/gcc_compile_wrapper.py",
-                                    root_build_dir)
-      command = "$python_path \"$compile_wrapper\"$whitelist_flag $command"
+      if (enable_resource_whitelist_generation) {
+        compile_wrapper =
+            rebase_path("//build/toolchain/gcc_compile_wrapper.py",
+                        root_build_dir)
+        command = "$python_path \"$compile_wrapper\" --resource-whitelist=\"{{output}}.whitelist\" $command"
+      }
     }
 
     tool("asm") {
       # For GCC we can just use the C compiler to compile assembly.
       depfile = "{{output}}.d"
       command = "$cc -MMD -MF $depfile ${rebuild_string}{{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
       depsformat = "gcc"
       description = "ASM {{output}}"
       outputs = [
         "$object_subdir/{{source_name_part}}.o",
@@ skipping 227 matching lines @@
     forward_variables_from(invoker, [ "strip" ])
 
     toolchain_args = {
       if (defined(invoker.toolchain_args)) {
         forward_variables_from(invoker.toolchain_args, "*")
       }
       is_clang = true
     }
   }
 }