Added crashpad support for Windows

headless/BUILD.gn

Index: headless/BUILD.gn
diff --git a/headless/BUILD.gn b/headless/BUILD.gn
index 719ee27900f1b89619513e535d12b2ca94dfdc20..2f86f791a4c3e2ad24f4011f8aebdba816a2852c 100644
--- a/headless/BUILD.gn
+++ b/headless/BUILD.gn
@@ -576,12 +576,10 @@ if (is_win) {
       "//net",
     ]
 
-    if (is_win) {
-      deps += [
-        "//content:sandbox_helper_win",
-        "//sandbox",
-      ]
-    }
+    deps += [
+      "//content:sandbox_helper_win",
+      "//sandbox",
+    ]
 
     configs += [ ":headless_implementation" ]
   }
@@ -662,7 +660,10 @@ static_library("headless_shell_lib") {
   }
 
   if (is_win) {
+    defines = [ "HEADLESS_USE_CRASPHAD" ]
+
     deps += [
+      "//components/crash/content/app:run_as_crashpad_handler",
       "//content:sandbox_helper_win",
       "//sandbox",
     ]