Use standard-priority GL context for VrShellGl.

chrome/browser/android/vr_shell/vr_shell_gl.cc

Index: chrome/browser/android/vr_shell/vr_shell_gl.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_gl.cc b/chrome/browser/android/vr_shell/vr_shell_gl.cc
index 9fffc436ee9f0a78ff6d5f6c7e52667724842335..a68f6f8d19889be3e8a2a44f770a77a3d37852f8 100644
--- a/chrome/browser/android/vr_shell/vr_shell_gl.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_gl.cc
@@ -289,9 +289,8 @@ void VrShellGl::InitializeGl(gfx::AcceleratedWidget window) {
     return;
   }
 
-  gl::GLContextAttribs attribs;
-  attribs.context_priority = gl::ContextPriorityHigh;
-  context_ = gl::init::CreateGLContext(nullptr, surface_.get(), attribs);
+  context_ = gl::init::CreateGLContext(nullptr, surface_.get(),
+                                       gl::GLContextAttribs());
   if (!context_.get()) {
     LOG(ERROR) << "gl::init::CreateGLContext failed";
     ForceExitVr();