Added support for GVR controllers

device/gamepad/gamepad_data_fetcher_manager.cc

Index: device/gamepad/gamepad_data_fetcher_manager.cc
diff --git a/device/gamepad/gamepad_data_fetcher_manager.cc b/device/gamepad/gamepad_data_fetcher_manager.cc
index 6b46eb80978a2307afea2a6d5c9440b329c95e99..cb91e165d314f7199a49a19c365bdca32624605b 100644
--- a/device/gamepad/gamepad_data_fetcher_manager.cc
+++ b/device/gamepad/gamepad_data_fetcher_manager.cc
@@ -38,11 +38,13 @@ void GamepadDataFetcherManager::RemoveSourceFactory(GamepadSource source) {
   if (provider_)
     provider_->RemoveSourceGamepadDataFetcher(source);
 
-  for (FactoryVector::iterator it = factories_.begin(); it != factories_.end();
-       ++it) {
+  for (FactoryVector::iterator it = factories_.begin();
+       it != factories_.end();) {
     if ((*it)->source() == source) {
       delete (*it);
-      factories_.erase(it);
+      it = factories_.erase(it);
+    } else {
+      ++it;
     }
   }
 }