Expose Gamepad API instance for Cardboard button

chrome/browser/android/vr_shell/vr_shell.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 65 matching lines @@
           bool reprojected_rendering);
   void SwapContents(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& web_contents,
       const base::android::JavaParamRef<jobject>& touch_event_synthesizer);
   void LoadUIContent(JNIEnv* env,
                      const base::android::JavaParamRef<jobject>& obj);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnTriggerEvent(JNIEnv* env,
-                      const base::android::JavaParamRef<jobject>& obj);
+                      const base::android::JavaParamRef<jobject>& obj,
+                      bool touched);
   void OnPause(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnResume(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void SetSurface(JNIEnv* env,
                   const base::android::JavaParamRef<jobject>& obj,
                   const base::android::JavaParamRef<jobject>& surface);
   void SetWebVrMode(JNIEnv* env,
                     const base::android::JavaParamRef<jobject>& obj,
                     bool enabled);
   bool GetWebVrMode(JNIEnv* env,
                     const base::android::JavaParamRef<jobject>& obj);
@@ skipping 125 matching lines @@
   bool is_capturing_audio_ = false;
   bool is_capturing_video_ = false;
   bool is_capturing_screen_ = false;
 
   // TODO(mthiesse): Remove the need for this to be stored here.
   // crbug.com/674594
   gvr_context* gvr_api_;
 
   // Are we currently providing a gamepad factory to the gamepad manager?
   bool gamepad_source_active_ = false;
   // Registered fetcher, must remain alive for UpdateGamepadData calls.

[mthiesse, 2017/05/16 00:44:37]

nit: fetchers

   // That's ok since the fetcher is only destroyed from VrShell's destructor.
-  device::GvrGamepadDataFetcher* gamepad_data_fetcher_ = nullptr;
+  std::vector<device::GvrGamepadDataFetcher*> gamepad_data_fetchers_;
 
   base::WeakPtrFactory<VrShell> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShell);
 };
 
 bool RegisterVrShell(JNIEnv* env);
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_