VrShell: Exit fullscreen on app button press.

chrome/browser/android/vr_shell/vr_shell.cc

 // 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.
 
 #include "chrome/browser/android/vr_shell/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include <string>
 #include <utility>
@@ skipping 470 matching lines @@
 
 void VrShell::ForceExitVr() {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_VrShellImpl_forceExitVr(env, j_vr_shell_.obj());
 }
 
 void VrShell::ExitPresent() {
   delegate_provider_->ExitWebVRPresent();
 }
 
+void VrShell::ExitFullscreen() {
+  if (web_contents_ && web_contents_->IsFullscreen()) {
+    web_contents_->ExitFullscreen(false);
+  }
+}
+
 void VrShell::OnVRVsyncProviderRequest(
     device::mojom::VRVSyncProviderRequest request) {
   PostToGlThreadWhenReady(base::Bind(&VrShellGl::OnRequest,
                                      gl_thread_->GetVrShellGl(),
                                      base::Passed(&request)));
 }
 
 void VrShell::UpdateVSyncInterval(int64_t timebase_nanos,
                                   double interval_seconds) {
   PostToGlThreadWhenReady(base::Bind(&VrShellGl::UpdateVSyncInterval,
@@ skipping 51 matching lines @@
            jlong gvr_api,
            jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, reinterpret_cast<ui::WindowAndroid*>(window_android),
       for_web_vr, in_cct,
       VrShellDelegate::GetNativeVrShellDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell