Add an action to create a symbol file for the Blimp engine

blimp/engine/BUILD.gn

Index: blimp/engine/BUILD.gn
diff --git a/blimp/engine/BUILD.gn b/blimp/engine/BUILD.gn
index fb1fe5a7f8c849a779a499d6537cbec7323ef94d..c7034c9e64b5a4193bed322f4b271e5fa2274cb2 100644
--- a/blimp/engine/BUILD.gn
+++ b/blimp/engine/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/chrome_build.gni")
 import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
@@ -531,4 +532,39 @@ if (is_linux) {
       rebase_path(_bundle),
     ]
   }
+
+  # Creates a breakpad symbol file for the engine. This takes a long time so
+  # it should only be done as part of the official build.
+  if (is_official_build) {
+    action("blimp_symbols") {
+      script = "//build/linux/dump_app_syms.py"
+
+      dump_syms_label = "//breakpad:dump_syms"
+      dump_syms_binary =
+          get_label_info(dump_syms_label, "root_out_dir") + "/" + "dump_syms"
+
+      engine_binary = "$root_out_dir/blimp_engine_app"
+      symbol_file = "$root_out_dir/blimp_engine_app.breakpad.x64"
+
+      inputs = [
+        engine_binary,
+        dump_syms_binary,
+      ]
+      outputs = [
+        symbol_file,
+      ]
+
+      args = [
+        "./" + rebase_path(dump_syms_binary, root_build_dir),
+        "0",  # strip_binary = false
+        rebase_path(engine_binary, root_build_dir),
+        rebase_path(symbol_file, root_build_dir),
+      ]
+
+      deps = [
+        ":blimp_engine_app",
+        dump_syms_label,
+      ]
+    }
+  }
 }