Enable crashpad for Mac

headless/BUILD.gn

Index: headless/BUILD.gn
diff --git a/headless/BUILD.gn b/headless/BUILD.gn
index 6345e098a44e826849f1c47b48357d3ed5478f6c..a4a762ef2914c01d990e0ee8b26f61d30112e806 100644
--- a/headless/BUILD.gn
+++ b/headless/BUILD.gn
@@ -323,7 +323,9 @@ static_library("headless_lib") {
     "//url",
   ]
 
-  if (!is_mac) {
+  if (is_mac) {
+    deps += [ ":mac_helpers" ]
+  } else {
     deps += [ "//ui/aura" ]
   }
 
@@ -413,6 +415,22 @@ repack("headless_browser_tests_pak") {
   ]
 }
 
+if (is_mac) {
+  copy("mac_helpers") {
+    sources = [
+      "$root_out_dir/crashpad_handler",
+    ]
+
+    deps = [
+      "//third_party/crashpad/crashpad/handler:crashpad_handler",
+    ]
+
+    outputs = [
+      "$root_out_dir/Helpers/{{source_file_part}}",
+    ]
+  }
+}
+
 test("headless_browsertests") {
   sources = [
     "lib/embedder_mojo_browsertest.cc",