Disable NTP URL bar while in VR on Android.

chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
index d5aa62871cf45c96649d40d3f45809298f3643e7..f378db427fa5ad2b80f189318eb927fd2685db38 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/NewTabPage.java
@@ -93,6 +93,8 @@ public class NewTabPage
     private FakeboxDelegate mFakeboxDelegate;
     private SnippetsBridge mSnippetsBridge;
 
+    private boolean mVoiceInputEnabled = true;
+
     // The timestamp at which the constructor was called.
     private final long mConstructedTimeNs;
 
@@ -152,6 +154,11 @@ public class NewTabPage
          * @return whether the provided native page is the one currently displayed to the user.
          */
         boolean isCurrentPage(NativePage nativePage);
+
+        /**
+         * See LocationBarLayout#setUrlBarFocusable.
+         */
+        void setUrlBarFocusable(boolean focusable);

[Ted C, 2017/06/02 17:01:51]

I feel there needs to be a path where this is isolated entirely within the NTP
package.  We shouldn't need to disable the omnibox as that view is hidden when
entering VR.

You can change focusSearchBox to return within the NewTabPage.java.  You can set
the fake box to invisible, you can disable it and the voice button.

     }
 
     /**
@@ -194,7 +201,8 @@ public class NewTabPage
 
         @Override
         public boolean isVoiceSearchEnabled() {
-            return mFakeboxDelegate != null && mFakeboxDelegate.isVoiceSearchEnabled();
+            return mVoiceInputEnabled && mFakeboxDelegate != null
+                    && mFakeboxDelegate.isVoiceSearchEnabled();
         }
 
         @TargetApi(Build.VERSION_CODES.LOLLIPOP)
@@ -405,6 +413,16 @@ public class NewTabPage
         mNewTabPageView.setUrlFocusAnimationsDisabled(disable);
     }
 
+    /**
+     * Updates whether input to the URL bar should be enabled.
+     * @param enable Whether to enable URL Bar input.
+     */
+    public void setUrlBarInputEnabled(boolean enable) {
+        mFakeboxDelegate.setUrlBarFocusable(enable);
+        mVoiceInputEnabled = enable;
+        mNewTabPageView.updateVoiceSearchButtonVisibility();
+    }
+
     private boolean isInSingleUrlBarMode(Context context) {
         if (DeviceFormFactor.isTablet()) return false;
         if (FeatureUtilities.isChromeHomeEnabled()) return false;