Expose Gamepad API instance for Cardboard button

device/vr/android/gvr/gvr_gamepad_data_provider.h

Index: device/vr/android/gvr/gvr_gamepad_data_provider.h
diff --git a/device/vr/android/gvr/gvr_gamepad_data_provider.h b/device/vr/android/gvr/gvr_gamepad_data_provider.h
index fcfcf68b94de7da0f70a65f4a15b72bac9c7d340..caa4c8f9209711ff3c055be99e0bc211fa14cfe0 100644
--- a/device/vr/android/gvr/gvr_gamepad_data_provider.h
+++ b/device/vr/android/gvr/gvr_gamepad_data_provider.h
@@ -60,7 +60,7 @@ class GvrGamepadDataProvider {
   // Called by the gamepad data fetcher constructor to register itself
   // for receiving data via SetGamepadData. The fetcher must remain
   // alive while the provider is calling SetGamepadData on it.
-  virtual void RegisterGamepadDataFetcher(GvrGamepadDataFetcher*) = 0;
+  virtual void RegisterGvrGamepadDataFetcher(GvrGamepadDataFetcher*) = 0;
 };
 
 }  // namespace device