VR: Enable browsing for CCT and make ui_scene_manager aware of whether we're in CCT.

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 9e35938f3b427a7c9aa092ddaf9468bc8c226b84..235f6ca120e0a92b87d5f266ffce112e22e9d327 100644
--- a/chrome/browser/android/vr_shell/vr_gl_thread.h
+++ b/chrome/browser/android/vr_shell/vr_gl_thread.h
@@ -27,6 +27,7 @@ class VrGLThread : public base::Thread {
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner,
       gvr_context* gvr_api,
       bool initially_web_vr,
+      bool in_cct,
       bool reprojected_rendering);
 
   ~VrGLThread() override;
@@ -52,6 +53,7 @@ class VrGLThread : public base::Thread {
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   gvr_context* gvr_api_;
   bool initially_web_vr_;
+  bool in_cct_;
   bool reprojected_rendering_;
 
   DISALLOW_COPY_AND_ASSIGN(VrGLThread);