Implement lazy initialization for VrShellDelegate

chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java
index 331ef5da2bce0b7d92994a4988f3cd1b98b67a1d..e79aa85581912fd5b151df6b197f7933a33bc58c 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellTest.java
@@ -46,7 +46,7 @@ public class VrShellTest extends ChromeTabbedActivityTestBase {
     @Override
     protected void setUp() throws Exception {
         super.setUp();
-        mDelegate = getActivity().getVrShellDelegate();
+        mDelegate = VrShellDelegate.getInstanceForTesting();
     }
 
     @Override
@@ -64,13 +64,13 @@ public class VrShellTest extends ChromeTabbedActivityTestBase {
         VrUtils.forceEnterVr(mDelegate);
         if (supported) {
             VrUtils.waitForVrSupported(mDelegate);
-            assertTrue(mDelegate.isInVR());
+            assertTrue(VrShellDelegate.isInVR());
         } else {
             assertFalse(mockApi.getLaunchInVrCalled());
-            assertFalse(mDelegate.isInVR());
+            assertFalse(VrShellDelegate.isInVR());
         }
         VrUtils.forceExitVr(mDelegate);
-        assertFalse(mDelegate.isInVR());
+        assertFalse(VrShellDelegate.isInVR());
     }
 
     private void enterExitVrModeImage(boolean supported) throws IOException {
@@ -116,9 +116,9 @@ public class VrShellTest extends ChromeTabbedActivityTestBase {
         VrUtils.simNfc(getActivity());
         if (supported) {
             VrUtils.waitForVrSupported(mDelegate);
-            assertTrue(mDelegate.isInVR());
+            assertTrue(VrShellDelegate.isInVR());
         } else {
-            assertFalse(mDelegate.isInVR());
+            assertFalse(VrShellDelegate.isInVR());
         }
         VrUtils.forceExitVr(mDelegate);
         // TODO(bsheedy): Figure out why NFC tests cause the next test to fail