[Mac/GN] If !debug_devtools, define a dummy target for //chrome:devtools_debug_resources.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index cc77145eed39f0ce4cdd833724bcb8a731a30ef3..b2d01f34dc370be2638fee9ea3f06599e0b8276b 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -762,32 +762,37 @@ if (is_win) {
   # framework in the app bundle, rather than the framework bundle in
   # root_out_dir, since copy_bundle_data copies the contents of the link
   # rather than the link itself.
-  action("devtools_debug_resources") {
-    _stamp = "$target_out_dir/run_${target_name}.stamp"
+  if (debug_devtools) {
+    action("devtools_debug_resources") {
+      _stamp = "$target_out_dir/run_${target_name}.stamp"
 
-    outputs = [
-      _stamp,
-    ]
+      outputs = [
+        _stamp,
+      ]
 
-    script = "//build/symlink.py"
-    args = [
-      "-f",
-      "--touch",
-      rebase_path(_stamp, root_out_dir),
+      script = "//build/symlink.py"
+      args = [
+        "-f",
+        "--touch",
+        rebase_path(_stamp, root_out_dir),
 
-      # Convert the symlink source and destination to an absolute paths, which
-      # makes symlinking easier (now pwd manipulation).
-      rebase_path("$root_out_dir/resources/inspector"),
-      rebase_path(
-          "$root_out_dir/$chrome_product_full_name.app/Contents/Versions/$chrome_version_full/$chrome_framework_name.framework/Resources/inspector"),
-    ]
+        # Convert the symlink source and destination to an absolute paths, which
+        # makes symlinking easier (now pwd manipulation).
+        rebase_path("$root_out_dir/resources/inspector"),
+        rebase_path(
+            "$root_out_dir/$chrome_product_full_name.app/Contents/Versions/$chrome_version_full/$chrome_framework_name.framework/Resources/inspector"),
+      ]
 
-    deps = [
-      # Depend on :chrome_app to ensure that the bundle is produced before
-      # creating or destroying the symlink.
-      ":chrome_app",
-      "//third_party/WebKit/public:blink_devtools_frontend_resources",
-    ]
+      deps = [
+        # Depend on :chrome_app to ensure that the bundle is produced before
+        # creating or destroying the symlink.
+        ":chrome_app",
+        "//third_party/WebKit/public:blink_devtools_frontend_resources",
+      ]
+    }
+  } else {
+    group("devtools_debug_resources") {
+    }
   }
 
   if (enable_nacl) {