Only use gcc_compile_wrapper when resource whitelisting is enabled.

build/toolchain/gcc_toolchain.gni

Index: build/toolchain/gcc_toolchain.gni
diff --git a/build/toolchain/gcc_toolchain.gni b/build/toolchain/gcc_toolchain.gni
index efc79b3fc413e2f8fe0c135884e5f4ff43fe6fd4..7ee2b6ad25e011bdbba41a6f11e9e7145204771d 100644
--- a/build/toolchain/gcc_toolchain.gni
+++ b/build/toolchain/gcc_toolchain.gni
@@ -221,10 +221,6 @@ template("gcc_toolchain") {
     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}${extra_cflags} -c {{source}} -o {{output}}"
       depsformat = "gcc"
@@ -234,16 +230,15 @@ template("gcc_toolchain") {
         # currently support multiple outputs for tool("cc").
         "$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}${extra_cxxflags} -c {{source}} -o {{output}}"
       depsformat = "gcc"
@@ -253,9 +248,12 @@ template("gcc_toolchain") {
         # currently support multiple outputs for tool("cxx").
         "$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") {