Use VrCoreCompatibility check for whether to show an infobar instead of Android package manager.

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java

Index: chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java
index 2757b618f14ede02a6d795256d0f72d26b79e1c3..abe855e63f518b3e9f31b82ad6d31e2f0c066a58 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreVersionChecker.java
@@ -4,13 +4,26 @@
 
 package org.chromium.chrome.browser.vr_shell;
 
+import android.support.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * Abstracts away the VrCoreVersionCheckerImpl class, which may or may not be present at runtime
  * depending on compile flags.
  */
 public interface VrCoreVersionChecker {
+    public static final int VR_CORE_NOT_AVAILABLE = 0;
+    public static final int VR_CORE_OUT_OF_DATE = 1;
+    public static final int VR_CORE_READY = 2;

[bshe, 2017/02/21 15:53:08]

optional nit: VR_CORE prefix is probably not needed?

[amp, 2017/02/21 19:30:18]

Done.

+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({VR_CORE_NOT_AVAILABLE, VR_CORE_OUT_OF_DATE, VR_CORE_READY})
+    public @interface VrCoreCompatibility {}
+
     /**
      * Test if VrCore version installed is compatible with Chromium.

[bshe, 2017/02/21 15:53:08]

Update this comment

[amp, 2017/02/21 19:30:18]

Done.

      */
-    boolean isVrCoreCompatible();
+    int isVrCoreCompatible();

[bshe, 2017/02/21 15:53:08]

It probably make sense to rename this function too. Something like
getVrCoreCompatibility?

[amp, 2017/02/21 19:30:18]

Done.

 }