[chromedriver] Add chrome.detach option for configuring Chrome not to quit

chrome/test/webdriver/commands/command.cc

Index: chrome/test/webdriver/commands/command.cc
diff --git a/chrome/test/webdriver/commands/command.cc b/chrome/test/webdriver/commands/command.cc
index 95ad878f54fed029c992e52aaa1dbb8505a671bb..3b1ea07562b2037127ce07daff46da3b5fe8b422 100644
--- a/chrome/test/webdriver/commands/command.cc
+++ b/chrome/test/webdriver/commands/command.cc
@@ -29,6 +29,8 @@ bool Command::Init(Response* const response) {
   return true;
 }
 
+void Command::Finish() {}
+
 std::string Command::GetPathVariable(const size_t i) const {
   return i < path_segments_.size() ? path_segments_.at(i) : "";
 }