[chromedriver] Remove unnecessary round trips to Chrome.

chrome/test/chromedriver/chrome/javascript_dialog_manager.cc

Index: chrome/test/chromedriver/chrome/javascript_dialog_manager.cc
diff --git a/chrome/test/chromedriver/chrome/javascript_dialog_manager.cc b/chrome/test/chromedriver/chrome/javascript_dialog_manager.cc
index 524d11876e6610205f8f28e77f5955edc7317787..34d02bcec8817240f6a44fbc0450de630594bd82 100644
--- a/chrome/test/chromedriver/chrome/javascript_dialog_manager.cc
+++ b/chrome/test/chromedriver/chrome/javascript_dialog_manager.cc
@@ -14,11 +14,9 @@ JavaScriptDialogManager::JavaScriptDialogManager(DevToolsClient* client)
   client_->AddListener(this);
 }
 
-JavaScriptDialogManager::~JavaScriptDialogManager() {
-}
+JavaScriptDialogManager::~JavaScriptDialogManager() {}
 
 bool JavaScriptDialogManager::IsDialogOpen() {
-  client_->HandleReceivedEvents();
   return !unhandled_dialog_queue_.empty();
 }