Reland of App button click exits WebVR presentation.

chrome/browser/android/vr_shell/vr_shell.cc

Index: chrome/browser/android/vr_shell/vr_shell.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell.cc b/chrome/browser/android/vr_shell/vr_shell.cc
index c1e7abfbe538bf7aec5a199cad6713374f001f49..e6b7c03fa09fffb402dac93a61041dfbb51a6428 100644
--- a/chrome/browser/android/vr_shell/vr_shell.cc
+++ b/chrome/browser/android/vr_shell/vr_shell.cc
@@ -425,9 +425,6 @@
                          const base::DictionaryValue* arguments) {
   // Actions that can be handled natively.
   switch (action) {
-    case EXIT_PRESENT:
-      delegate_provider_->ExitWebVRPresent();
-      return;
     default:
       break;
   }
@@ -487,6 +484,10 @@
   Java_VrShellImpl_forceExitVr(env, j_vr_shell_.obj());
 }
 
+void VrShell::ExitPresent() {
+  delegate_provider_->ExitWebVRPresent();
+}
+
 void VrShell::OnVRVsyncProviderRequest(
     device::mojom::VRVSyncProviderRequest request) {
   PostToGlThreadWhenReady(base::Bind(&VrShellGl::OnRequest,