Fix DCHECH errors on Windows

headless/lib/headless_content_main_delegate.cc

Index: headless/lib/headless_content_main_delegate.cc
diff --git a/headless/lib/headless_content_main_delegate.cc b/headless/lib/headless_content_main_delegate.cc
index 8526274a3c0bb10061e7d9eedf241a568cac7503..e5ae9ec9d7ccce0f23546d937269f1a61d6ef9ce 100644
--- a/headless/lib/headless_content_main_delegate.cc
+++ b/headless/lib/headless_content_main_delegate.cc
@@ -98,10 +98,16 @@ bool HeadlessContentMainDelegate::BasicStartupComplete(int* exit_code) {
 
 void HeadlessContentMainDelegate::InitLogging(
     const base::CommandLine& command_line) {
+  const std::string process_type =
+      command_line.GetSwitchValueASCII(switches::kProcessType);
 #if !defined(OS_WIN)
   if (!command_line.HasSwitch(switches::kEnableLogging))
     return;
-#endif
+#else
+  // Child processes in Windows are not able to initialize logging.
+  if (!process_type.empty())
+    return;
+#endif  // !defined(OS_WIN)
 
   logging::LoggingDestination log_mode;
   base::FilePath log_filename(FILE_PATH_LITERAL("chrome_debug.log"));
@@ -146,9 +152,6 @@ void HeadlessContentMainDelegate::InitLogging(
     log_path = base::FilePath::FromUTF8Unsafe(filename);
   }
 
-  const std::string process_type =
-      command_line.GetSwitchValueASCII(switches::kProcessType);
-
   settings.logging_dest = log_mode;
   settings.log_file = log_path.value().c_str();
   settings.lock_log = logging::DONT_LOCK_LOG_FILE;