Switch WebVR to handle GvrApi management through VrShellDelegate

chrome/browser/android/vr_shell/vr_shell.h

Index: chrome/browser/android/vr_shell/vr_shell.h
diff --git a/chrome/browser/android/vr_shell/vr_shell.h b/chrome/browser/android/vr_shell/vr_shell.h
index b415f2ab5a2692a16c498f296f27f4de6b037f72..96484f59040ca263441355165bc549f9880e501a 100644
--- a/chrome/browser/android/vr_shell/vr_shell.h
+++ b/chrome/browser/android/vr_shell/vr_shell.h
@@ -19,6 +19,7 @@
 
 namespace vr_shell {
 
+class VrShellDelegate;
 class VrShellRenderer;
 
 
@@ -27,6 +28,9 @@ class VrShell : public device::GvrDelegate {
   VrShell(JNIEnv* env, jobject obj);
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void SetDelegate(JNIEnv* env,
+               const base::android::JavaParamRef<jobject>& obj,
+               jlong native_delegate);
   void GvrInit(JNIEnv* env,
                const base::android::JavaParamRef<jobject>& obj,
                jlong native_gvr_api);
@@ -36,10 +40,11 @@ class VrShell : public device::GvrDelegate {
   void DrawFrame(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnPause(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnResume(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void SetWebVrMode(JNIEnv* env,
+                    const base::android::JavaParamRef<jobject>& obj,
+                    bool enabled);
 
-  // GvrDelegate
-  void RequestWebVRPresent() override;
-  void ExitWebVRPresent() override;
+  // device::GvrDelegate implementation
   void SubmitWebVRFrame() override;
   void UpdateWebVRTextureBounds(
       int eye, float left, float top, float width, float height) override;
@@ -81,6 +86,7 @@ class VrShell : public device::GvrDelegate {
 
   gvr::Sizei render_size_;
 
+  VrShellDelegate* delegate_;
   std::unique_ptr<VrShellRenderer> vr_shell_renderer_;
   base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_;