VR: System indicator rework.

chrome/browser/android/vr_shell/vr_gl_thread.h

Index: chrome/browser/android/vr_shell/vr_gl_thread.h
diff --git a/chrome/browser/android/vr_shell/vr_gl_thread.h b/chrome/browser/android/vr_shell/vr_gl_thread.h
index 51ee8bd9bc955d78dd3c4b5bc4ca66b2069fab02..5359b2fa8b883352dec9abe87b12bb8f4c5b3644 100644
--- a/chrome/browser/android/vr_shell/vr_gl_thread.h
+++ b/chrome/browser/android/vr_shell/vr_gl_thread.h
@@ -46,7 +46,7 @@ class VrGLThread : public base::Thread,
     return weak_scene_manager_;
   }
 
-  // GlBrowserInterface implementation (VrShellGl calling to VrShell).
+  // GlBrowserInterface implementation (VrShellGl calling out to UI/VrShell).
   void ContentSurfaceChanged(jobject surface) override;
   void GvrDelegateReady(gvr::ViewerType viewer_type) override;
   void UpdateGamepadData(device::GvrGamepadData) override;
@@ -60,6 +60,7 @@ class VrGLThread : public base::Thread,
       device::mojom::VRDisplayInfoPtr* info) override;
   void OnContentPaused(bool enabled) override;
   void ToggleCardboardGamepad(bool enabled) override;
+  void OnGLInitialized() override;

[asimjour1, 2017/06/22 14:46:00]

Is this the only instance that VrShellGl calling out to UI?

[cjgrant, 2017/06/22 15:51:39]

No, the other GL to UI calls already exist:

AppButtonGesturePerformed()
AppButtonClicked()

This interface is basically GL calling out to "anything else", and hides (from
GL) who or what handles the call.

 
   // UiBrowserInterface implementation (UI calling to VrShell).
   void ExitPresent() override;