VR: Disable Overscroll Glow in VrShell

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 a649757d1fa4bf7b6a466cbc35e1883bab7bf3bf..aaf62f9edbf667b4a54134370c032e03ca82da57 100644
--- a/chrome/browser/android/vr_shell/vr_shell.cc
+++ b/chrome/browser/android/vr_shell/vr_shell.cc
@@ -18,6 +18,7 @@
 #include "chrome/browser/android/vr_shell/vr_web_contents_observer.h"
 #include "chrome/browser/browser_process.h"
 #include "components/rappor/rappor_utils.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
@@ -235,6 +236,8 @@ void VrShell::GvrInit(JNIEnv* env,
   metrics_helper_->SetWebVREnabled(webvr_mode_);
   metrics_helper_->SetVRActive(true);
 
+  SetShowingOverscrollGlow(false);
+
   gvr_api_ =
       gvr::GvrApi::WrapNonOwned(reinterpret_cast<gvr_context*>(native_gvr_api));
   // TODO(klausw,crbug.com/655722): should report OnGvrDelegateReady here once
@@ -870,6 +873,7 @@ void VrShell::OnPause(JNIEnv* env, const JavaParamRef<jobject>& obj) {
     return;
   controller_->OnPause();
   gvr_api_->PauseTracking();
+  SetShowingOverscrollGlow(true);
 
   // exit vr session
   metrics_helper_->SetVRActive(false);
@@ -882,11 +886,24 @@ void VrShell::OnResume(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   gvr_api_->RefreshViewerProfile();
   gvr_api_->ResumeTracking();
   controller_->OnResume();
+  SetShowingOverscrollGlow(false);
 
   // exit vr session
   metrics_helper_->SetVRActive(true);
 }
 
+void VrShell::SetShowingOverscrollGlow(bool showing_glow) {
+  if (!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)) {
+    content::BrowserThread::PostTask(
+        content::BrowserThread::UI, FROM_HERE,
+        base::Bind(&VrShell::SetShowingOverscrollGlow,
+                   weak_ptr_factory_.GetWeakPtr(), showing_glow));
+  } else {
+    main_contents_->GetRenderWidgetHostView()->SetShowingOverscrollGlow(
+        showing_glow);
+  }
+}
+
 base::WeakPtr<VrShell> VrShell::GetWeakPtr(
     const content::WebContents* web_contents) {
   // Ensure that the WebContents requesting the VrShell instance is the one